15000000000

15000000000, written with decimal punctuation as 15,000,000,000, is a natural number. It equals 1.5 × 10^10 in scientific notation and is the integer immediately following 14,999,999,999 and preceding 15,000,000,001.

In the short scale used by most English-speaking countries, this value is read as fifteen billion. In the older long-scale system, it could be described as fifteen thousand million or fifteen milliards. The number factors as 2^9 × 3 × 5^10, meaning it is divisible by 2, 3, and 5, among other divisors. It is a multiple of 10^9, since 15,000,000,000 = 15 × 10^9.

In information contexts, 15,000,000,000 bytes corresponds to 15 gigabytes (decimal). In binary terms, this amount is about 13.97 gibibytes (GiB). The magnitude makes the number suitable for representing large counts in statistics, population data, budgets, or storage capacities, though it is not associated with a specific historical event or widely recognized constant.