31920504853 has 12 divisors (see below), whose sum is σ = 32182610988. Its totient is φ = 31660295040.

The previous prime is 31920504841. The next prime is 31920504877. The reversal of 31920504853 is 35840502913.

It can be written as a sum of positive squares in 2 ways, for example, as 18690444369 + 13230060484 = 136713^2 + 115022^2 .

It is not a de Polignac number, because 31920504853 - 2¹⁷ = 31920373781 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 (31920534853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14770093 + ... + 14772253.

It is an arithmetic number, because the mean of its divisors is an integer number (2681884249).

Almost surely, 2^31920504853 is an apocalyptic number.

It is an amenable number.

31920504853 is a deficient number, since it is larger than the sum of its proper divisors (262106135).

31920504853 is an equidigital number, since it uses as much as digits as its factorization.

31920504853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2932 (or 2733 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 31920504853 in words is "thirty-one billion, nine hundred twenty million, five hundred four thousand, eight hundred fifty-three".