15127918920 has 48 divisors (see below), whose sum is σ = 49165737660. Its totient is φ = 4034111616.

The previous prime is 15127918903. The next prime is 15127918943. The reversal of 15127918920 is 2981972151.

It can be written as a sum of positive squares in 2 ways, for example, as 14352519204 + 775399716 = 119802^2 + 27846^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21010639 + ... + 21011358.

Almost surely, 2^15127918920 is an apocalyptic number.

15127918920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15127918920 is an abundant number, since it is smaller than the sum of its proper divisors (34037818740).

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

15127918920 is a wasteful number, since it uses less digits than its factorization.

15127918920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42022014 (or 42022007 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 45.

The spelling of 15127918920 in words is "fifteen billion, one hundred twenty-seven million, nine hundred eighteen thousand, nine hundred twenty".