1,000,000,000 (One billion, see below) is the natural number following 999,999,999 and preceding 1,000,000,001. Aleph-0, the smallest infinite cardinal In mathematics, cardinal numbers, or cardinals for short, are a generalized kind of number used to denote the size of a set, known as its cardinality. ... The long and short scales are two different numerical systems used throughout the world: Short scale is the English translation of the French term échelle courte. ... In set theory, ordinal, ordinal number, and transfinite ordinal number refer to a type of number introduced by Georg Cantor in 1897, to accommodate infinite sequences and to classify sets with certain kinds of order structures on them. ... ... The binary numeral system, or base-2 number system, is a numeral system that represents numeric values using two symbols, usually 0 and 1. ... In mathematics and computer science, hexadecimal, base-16, or simply hex, is a numeral system with a radix, or base, of 16, usually written using the symbols 0–9 and A–F, or a–f. ... In mathematics, a natural number can mean either an element of the set {1, 2, 3, ...} (i. ...

In scientific notation, it is written as 10⁹. Scientific notation, also known as standard form, is a notation for writing numbers that is often used by scientists and mathematicians to make it easier to write large and small numbers. ...

In modern ('short scale') English language usage, it is usually called a billion (although in many other languages and 'long scale' usage, a billion means a million millions (or 1,000,000,000,000), instead of a thousand millions). The long and short scales are two different numerical systems used throughout the world: Short scale is the English translation of the French term échelle courte. ... The long and short scales are two different numerical systems used throughout the world: Short scale is the English translation of the French term échelle courte. ... One million million (1,000,000,000,000) is the natural number following 999,999,999,999 and preceding 1,000,000,000,001. ...

The term milliard can also be used to refer to 1,000,000,000, though this terminology is rarely used in the English language, but often in other languages. Milliard is a French-derived word meaning the number 1,000,000,000 (109; one thousand million; SI prefix giga). ... The long and short scales are two different numerical systems used throughout the world: Short scale is the English translation of the French term échelle courte. ...

Physical quantities can be expressed using the SI prefix giga. An SI prefix (also known as a metric prefix) is a name or associated symbol that precedes a unit of measure (or its symbol) to form a decimal multiple or submultiple. ... Look up giga- in Wiktionary, the free dictionary. ...

See Orders of magnitude (numbers) for larger numbers; and long and short scales. This list compares various sizes of positive numbers, including counts of things, dimensionless numbers and probabilities. ... The long and short scales are two different numerical systems used throughout the world: Short scale is the English translation of the French term échelle courte. ...

Selected 10-digit numbers (1000000000 - 9999999999)

• 1023456789 - smallest pandigital number in base 10
• 1026753849 - smallest pandigital square, including 0
• 1073676287 - 15th Carol number
• 1073741824 = 2³⁰
• 1073807359 - 14th Kynea number
• 1129760415 - 23rd Motzkin number
• 1134903170 - 45th Fibonacci number
• 1162261467 = 3¹⁹
• 1220703125 = 5¹²
• 1234567890 - pandigital number with the digits in order
• 1311738121 - 25th Pell number
• 1382958545 - 15th Bell number
• 1406818759 - 30th Wedderburn-Etherington number
• 1836311903 - 46th Fibonacci number
• 1977326743 = 7¹¹
• 2147483647 - 8th Mersenne prime and the largest signed 32-bit integer
• 2147483648 = 2³¹
• 2214502422 - 6th primary pseudoperfect number
• 2357947691 = 11⁹
• 2971215073 - 11th Fibonacci prime (47th Fibonacci number)
• 3166815962 - 26th Pell number
• 3192727797 - 24th Motzkin number
• 3323236238 - 31st Wedderburn-Etherington number
• 3486784401 = 3²⁰
• 4294836223 - 16th Carol number
• 4294967295 - Maximum 32-bit unsigned integer (hexadecimal FFFFFFFF)
• 4294967296 = 2³²
• 4294967297 - the first composite Fermat number
• 4295098367 - 15th Kynea number
• 4807526976 - 48th Fibonacci number
• 5784634181 - 13th alternating factorial
• 6210001000 - only self-descriptive number in base 10
• 6227020800 = 13!
• 6983776800 - 15th colossally abundant number
• 7645370045 - 27th Pell number
• 7778742049 - 49th Fibonacci number
• 7862958391 - 32nd Wedderburn-Etherington number
• 8589869056 - 6th perfect number
• 8589934592 = 2³³
• 9043402501 - 25th Motzkin number
• 9814072356 - largest square pandigital number, largest pandigital pure power
• 9876543210 - largest pandigital number without redundant digits

A pandigital number is an integer that in a given base has among its significant digits each digit used in the base at least once. ... A Carol number is an integer of the form . ... A Kynéa number (pronounced: Ka-Nay), named after Kynéa R. Griffith, is an integer of the form . ... In mathematics, a Motzkin number for a given number n is the number of different ways of drawing non-intersecting chords on a circle between n points. ... A tiling with squares whose sides are successive Fibonacci numbers in length A Fibonacci spiral, created by drawing arcs connecting the opposite corners of squares in the Fibonacci tiling shown above – see golden spiral In mathematics, the Fibonacci numbers form a sequence defined by the following recurrence relation: That is... In mathematics, the Pell numbers and companion Pell numbers (Pell-Lucas numbers) are both sequences of integers. ... The Bell numbers, named in honor of Eric Temple Bell, are a sequence of integers arising in combinatorics that begins thus (sequence A000110 in OEIS): In general, Bn is the number of partitions of a set of size n. ... A Wedderburn-Etherington number counts how many weakly binary trees can be constructed such that each graph vertex (not counting the root vertex) is adjacent to no more than three other such vertices, for a given number of nodes. ... In mathematics, a Mersenne number is a number that is one less than a power of two. ... In mathematics, and in particular number theory, a primary pseudoperfect number is a number N that satisfies the Egyptian fraction equation where the sum is over only the prime divisors of N. Equivalently (as can be seen by multiplying this equation by N), Except for the exceptional primary pseudoperfect number... An alternating factorial is the sum of the first n factorials with the odd-indexed factorials multiplied by −1 if n is even, and the even-indexed factorials multiplied by −1 if n is odd, resulting in an alternation of signs of the summands (or alternation of addition and subtraction... A self-descriptive number is an integer m that in a given base b is b-digits long in which each digit d at position n (the most significant digit being at position 0 and the least significant at position b - 1) counts how many instances of digit n are... For factorial rings in mathematics, see unique factorisation domain. ... In mathematics, a colossally abundant number (sometimes abbreviated as CA) is a certain kind of natural number. ... In mathematics, a perfect number is defined as an integer which is the sum of its proper positive divisors, that is, the sum of the positive divisors not including the number. ... 9814072356 is 99066 squared, and is the eighty seventh and largest square number using the digits 1, 2, 3, 4, 5, 6, 7, 8, 9, and 0 exactly once - a pandigital number that is also a square, (sequence A036745 in OEIS). ...

Sense of scale

The facts below give a sense of how large 1,000,000,000 (10⁹) is in the context of time:

• 10⁹ seconds is about 31.7 years.
• About 10⁹ minutes ago, the Roman Empire was flourishing. (10⁹ minutes is roughly 1,900 years.)
• About 10⁹ hours ago, modern human beings and their ancestors were living in the Stone Age (more precisely, the Middle Paleolithic). (10⁹ hours is roughly 114,000 years.)
• About 10⁹ days ago, Australopithecus, an ape-like creature related to an ancestor of modern humans, roamed the African savannas. (10⁹ days is roughly 2.7 million years.)
• About 10⁹ months ago, dinosaurs walked the earth during the late Cretaceous. (10⁹ months is roughly 82 million years.)
• About 10⁹ years ago, the first multicellular organisms appeared on Earth.
• The universe is currently thought to be about 13.7 × 10⁹ years old.

In terms of distance: For other uses, see Roman Empire (disambiguation). ... Stone Age fishing hook. ... The Middle Paleolithic (or Middle Palaeolithic) is the second subdivision of the Paleolithic or Old Stone Age as it is understood in Europe, Africa and Asia. ... For the song by Modest Mouse, see Sad Sappy Sucker. ... This article is about grassland. ... Orders & Suborders Saurischia Sauropodomorpha Theropoda Ornithischia Thyreophora Ornithopoda Marginocephalia Dinosaurs were vertebrate animals that dominated the terrestrial ecosystem for over 160 million years, first appearing approximately 230 million years ago. ... // The Cretaceous Period (pronounced ) is one of the major divisions of the geologic timescale, reaching from the end of the Jurassic Period (i. ... Wild-type Caenorhabditis elegans hermaphrodite stained to highlight the nuclei of all cells Multicellular organisms are organisms consisting of more than one cell, and having differentiated cells that perform specialized functions. ... For other uses, see Universe (disambiguation). ...

• 10⁹ centimetres is about the distance from Chicago, Illinois to Tokyo.
• 10⁹ inches is 15,783 miles, more than halfway around the world and sufficient to reach any point on the globe from any other point.
• 10⁹ metres is almost three times the distance from the Earth to the Moon.
• 10⁹ kilometres is over six times the distance from the Earth to the Sun.

In terms of finance: A centimetre (American spelling centimeter, symbol cm) is a unit of length that is equal to one hundredth of a metre, the current SI base unit of length. ... For other uses, see Chicago (disambiguation). ... This article is about the U.S. State. ... For other uses, see Tokyo (disambiguation). ... An inch (plural: inches; symbol or abbreviation: in or, sometimes, ″ - a double prime) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ... “Miles” redirects here. ... This article is about the unit of length. ... This article is about Earth as a planet. ... This article is about Earths moon. ... “km” redirects here. ... Sol redirects here. ...

• The possession of 10⁹ United States dollars would place a person among the world's wealthiest individuals.

In terms of count: USD redirects here. ... Billion and Billionaire in the context of the following lists refers to the short scale meaning of the word i. ...

A is a cube; B consists of 1000 cubes of type A. C consists of 1000 Bs; and D 1000 Cs. Thus there are 1 million As in C; and 1,000,000,000 As in D. Likewise, there are 1,000,000,000 cubic millimeters in a cubic meter.

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