31689923372 has 24 divisors (see below), whose sum is σ = 55897017792. Its totient is φ = 15719418000.

The previous prime is 31689923371. The next prime is 31689923381. The reversal of 31689923372 is 27332998613.

It is not an unprimeable number, because it can be changed into a prime (31689923371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2430623 + ... + 2443625.

It is an arithmetic number, because the mean of its divisors is an integer number (2329042408).

Almost surely, 2^31689923372 is an apocalyptic number.

It is an amenable number.

31689923372 is a deficient number, since it is larger than the sum of its proper divisors (24207094420).

31689923372 is a wasteful number, since it uses less digits than its factorization.

31689923372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17789 (or 17787 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 53.

The spelling of 31689923372 in words is "thirty-one billion, six hundred eighty-nine million, nine hundred twenty-three thousand, three hundred seventy-two".