| 1000000000 | |
|---|---|
| Cardinal | One billion (short scale) One thousand million, or one milliard (long scale) |
| Ordinal | One billionth (short scale) |
| Factorization |
|
| Greek numeral | |
| Roman numeral | M |
| Binary | 1110111001101011001010000000002 |
| Ternary | 21202002000210100013 |
| Senary | 2431212453446 |
| Octal | 73465450008 |
| Duodecimal | 23AA9385412 |
| Hexadecimal | 3B9ACA0016 |
1,000,000,000 (one billion, short scale; one thousand million or one milliard, one yard,[1] long scale) is the natural number following 999,999,999 and preceding 1,000,000,001. With a number, "billion" can be abbreviated as b, bil[citation needed] or bn.[2][3]
In standard form, it is written as 1 × 109. The metric prefix giga indicates 1,000,000,000 times the base unit. Its symbol is G.
One billion years may be called an eon in astronomy or geology.
Previously in British English (but not in American English), the word "billion" referred exclusively to a million millions (1,000,000,000,000). However, this is not common anymore, and the word has been used to mean one thousand million (1,000,000,000) for several decades.[4]
The term milliard could also be used to refer to 1,000,000,000; whereas "milliard" is rarely used in English,[5] variations on this name often appear in other languages.
In the Indian numbering system, it is known as 100 crore or 1 arab.
1,000,000,000 is also the cube of 1000.
- ^ "Yard". Investopedia. Retrieved 13 November 2017.
- ^ "figures". The Economist Style Guide (11th ed.). The Economist. 2015. ISBN 9781782830917.
- ^ "6.5 Abbreviating 'million' and 'billion'". English Style Guide: A handbook for authors and translators in the European Commission (PDF) (8th ed.). European Commission. 3 November 2017. p. 32.
- ^ "How many is a billion?". OxfordDictionaries.com. Archived from the original on January 12, 2017. Retrieved 13 November 2017.
- ^ "billion,thousand million,milliard". Google Ngram Viewer. Retrieved 13 November 2017.