1,000,000,000
1,000,000,000 (one billion, short scale; one thousand million or milliard, long scale) is the natural number following 999,999,999 and preceding 1,000,000,001. In scientific notation, it is written as "1 × 109". Previously in British English (but not in American English), the word "billion" referred to a million millions (1,000,000,000,000). However, this is no longer the case, and the word has been used unambiguously to mean one thousand million (1,000,000,000) for some time. The alternative term "one thousand million" is rare and is used primarily to ease understanding among non-native speakers of English, as many other languages use words similar to "billion" (e.g. Spanish
billón) to mean one trillion (1,000,000,000,000 or a million millions). In the South Asian numbering system, it is known as 100 crore or 1 Arab. The term
milliard can also be used to refer to 1,000,000,000; though "milliard" is very seldom used in English, variations on this name often appear in other languages (e.g.