31838760621 has 12 divisors (see below), whose sum is σ = 45991913500. Its totient is φ = 21224643840.

The previous prime is 31838760601. The next prime is 31838760631. The reversal of 31838760621 is 12606783813.

31838760621 is a `hidden beast` number, since 3 + 1 + 8 + 38 + 7 + 606 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22443335721 + 9395424900 = 149811^2 + 96930^2 .

It is not a de Polignac number, because 31838760621 - 2⁶ = 31838760557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31838760601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87255 + ... + 267003.

Almost surely, 2^31838760621 is an apocalyptic number.

It is an amenable number.

31838760621 is a deficient number, since it is larger than the sum of its proper divisors (14153152879).

31838760621 is a wasteful number, since it uses less digits than its factorization.

31838760621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199436 (or 199433 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 31838760621 in words is "thirty-one billion, eight hundred thirty-eight million, seven hundred sixty thousand, six hundred twenty-one".