15900014920 has 16 divisors (see below), whose sum is σ = 35775033660. Its totient is φ = 6360005952.

The previous prime is 15900014909. The next prime is 15900014947. The reversal of 15900014920 is 2941000951.

It can be written as a sum of positive squares in 2 ways, for example, as 15400313604 + 499701316 = 124098^2 + 22354^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198750147 + ... + 198750226.

Almost surely, 2^15900014920 is an apocalyptic number.

15900014920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15900014920 is an abundant number, since it is smaller than the sum of its proper divisors (19875018740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15900014920 is a wasteful number, since it uses less digits than its factorization.

15900014920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397500384 (or 397500380 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 31.

The spelling of 15900014920 in words is "fifteen billion, nine hundred million, fourteen thousand, nine hundred twenty".