21374403761610 has 48 divisors (see below), whose sum is σ = 58842476242056. Its totient is φ = 5364556237824.

The previous prime is 21374403761603. The next prime is 21374403761639. The reversal of 21374403761610 is 1616730447312.

21374403761610 is a `hidden beast` number, since 2 + 13 + 7 + 4 + 4 + 0 + 3 + 7 + 616 + 10 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 20619491275161 + 754912486449 = 4540869^2 + 868857^2 .

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 23 ways as a sum of consecutive naturals, for example, 6985097739 + ... + 6985100798.

Almost surely, 2^{21374403761610} is an apocalyptic number.

21374403761610 is an abundant number, since it is smaller than the sum of its proper divisors (37468072480446).

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

21374403761610 is a wasteful number, since it uses less digits than its factorization.

21374403761610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13970198567 (or 13970198564 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 21374403761610 in words is "twenty-one trillion, three hundred seventy-four billion, four hundred three million, seven hundred sixty-one thousand, six hundred ten".