Billion is a word for a large number, and it has two distinct definitions: 1,000,000,000, i.e. one thousand million, or 109 (ten to the ninth power), as defined on the short scale (also known as a milliard on the long scale).
With a number, "billion" can be abbreviated as b, bil or bn. In standard form, it is written as 1 × 109. The metric prefix giga indicates 1,000,000,000 times the base unit.
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What does b mean on a dollar bill?
A No. 2, for example, means it was printed in New York. The District Seal also includes the letters (in this case B) that specify the dollar's issuing Reserve Bank. New York is the Second Federal Reserve District and is designated by the letter B.
A billion is a very large number that represents one thousand million (1,000,000,000). It is often used to describe extremely large quantities or amounts of something.
Rather than use the barred M, however, accounting went with MM as an abbreviation for a million. For example, 1MM equals 1 million, $34MM equals $34 million and so on.
Quintillion is the denomination used for large numbers. A quintillion is the number name for 10 raised to the power of 18, that is, one followed by 18 zeros. In the International numeral system, a quintillion has 6 groups of zeros in 3, that is, 1,000,000,000,000,000,000.
