21037355124 has 24 divisors (see below), whose sum is σ = 49133985600. Its totient is φ = 7005762624.

The previous prime is 21037355093. The next prime is 21037355149. The reversal of 21037355124 is 42155373012.

It is a super-2 number, since 2×21037355124² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 823024 + ... + 848199.

It is an arithmetic number, because the mean of its divisors is an integer number (2047249400).

Almost surely, 2^21037355124 is an apocalyptic number.

It is an amenable number.

21037355124 is an abundant number, since it is smaller than the sum of its proper divisors (28096630476).

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

21037355124 is a wasteful number, since it uses less digits than its factorization.

21037355124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672279 (or 1672277 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The spelling of 21037355124 in words is "twenty-one billion, thirty-seven million, three hundred fifty-five thousand, one hundred twenty-four".