31703872820 has 96 divisors (see below), whose sum is σ = 68850093312. Its totient is φ = 12257280000.

The previous prime is 31703872817. The next prime is 31703872841. The reversal of 31703872820 is 2827830713.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49459700 + ... + 49460340.

It is an arithmetic number, because the mean of its divisors is an integer number (717188472).

Almost surely, 2^31703872820 is an apocalyptic number.

It is an amenable number.

31703872820 is an abundant number, since it is smaller than the sum of its proper divisors (37146220492).

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

31703872820 is a wasteful number, since it uses less digits than its factorization.

31703872820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353 (or 1351 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The spelling of 31703872820 in words is "thirty-one billion, seven hundred three million, eight hundred seventy-two thousand, eight hundred twenty".