31920504852 has 24 divisors (see below), whose sum is σ = 78862424256. Its totient is φ = 10014275968.

The previous prime is 31920504841. The next prime is 31920504877. The reversal of 31920504852 is 25840502913.

It is a self number, because there is not a number n which added to its sum of digits gives 31920504852.

It is a congruent number.

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, 78236328 + ... + 78236735.

It is an arithmetic number, because the mean of its divisors is an integer number (3285934344).

Almost surely, 2^31920504852 is an apocalyptic number.

It is an amenable number.

31920504852 is an abundant number, since it is smaller than the sum of its proper divisors (46941919404).

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

31920504852 is a wasteful number, since it uses less digits than its factorization.

31920504852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156473087 (or 156473085 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 31920504852 in words is "thirty-one billion, nine hundred twenty million, five hundred four thousand, eight hundred fifty-two".