31603274920 has 32 divisors (see below), whose sum is σ = 81265564800. Its totient is φ = 10835408448.

The previous prime is 31603274897. The next prime is 31603274933. The reversal of 31603274920 is 2947230613.

It is a self number, because there is not a number n which added to its sum of digits gives 31603274920.

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, 56434140 + ... + 56434699.

It is an arithmetic number, because the mean of its divisors is an integer number (2539548900).

Almost surely, 2^31603274920 is an apocalyptic number.

It is an amenable number.

31603274920 is an abundant number, since it is smaller than the sum of its proper divisors (49662289880).

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

31603274920 is a wasteful number, since it uses less digits than its factorization.

31603274920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112868857 (or 112868853 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 37.

It can be divided in two parts, 3160 and 3274920, that added together give a triangular number (3278080 = T₂₅₆₀).

The spelling of 31603274920 in words is "thirty-one billion, six hundred three million, two hundred seventy-four thousand, nine hundred twenty".