15995212420 has 24 divisors (see below), whose sum is σ = 36643578048. Its totient is φ = 5816440800.

The previous prime is 15995212357. The next prime is 15995212439. The reversal of 15995212420 is 2421259951.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36352536 + ... + 36352975.

It is an arithmetic number, because the mean of its divisors is an integer number (1526815752).

Almost surely, 2^15995212420 is an apocalyptic number.

15995212420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15995212420 is an abundant number, since it is smaller than the sum of its proper divisors (20648365628).

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

15995212420 is a wasteful number, since it uses less digits than its factorization.

15995212420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72705531 (or 72705529 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 15995212420 in words is "fifteen billion, nine hundred ninety-five million, two hundred twelve thousand, four hundred twenty".