21037625125 has 16 divisors (see below), whose sum is σ = 28641772224. Its totient is φ = 15300090000.

The previous prime is 21037625107. The next prime is 21037625159. The reversal of 21037625125 is 52152673012.

It is not a de Polignac number, because 21037625125 - 2¹¹ = 21037623077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7648671 + ... + 7651420.

It is an arithmetic number, because the mean of its divisors is an integer number (1790110764).

Almost surely, 2^21037625125 is an apocalyptic number.

21037625125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21037625125 is a deficient number, since it is larger than the sum of its proper divisors (7604147099).

21037625125 is a wasteful number, since it uses less digits than its factorization.

21037625125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15300117 (or 15300107 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 21037625125 in words is "twenty-one billion, thirty-seven million, six hundred twenty-five thousand, one hundred twenty-five".