31686342192 has 60 divisors (see below), whose sum is σ = 89208821520. Its totient is φ = 10498859904.

The previous prime is 31686342101. The next prime is 31686342203. The reversal of 31686342192 is 29124368613.

31686342192 is a `hidden beast` number, since 3 + 1 + 6 + 8 + 634 + 2 + 1 + 9 + 2 = 666.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 634767 + ... + 682862.

It is an arithmetic number, because the mean of its divisors is an integer number (1486813692).

Almost surely, 2^31686342192 is an apocalyptic number.

It is an amenable number.

31686342192 is an abundant number, since it is smaller than the sum of its proper divisors (57522479328).

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

31686342192 is a wasteful number, since it uses less digits than its factorization.

31686342192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317810 (or 1317801 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The spelling of 31686342192 in words is "thirty-one billion, six hundred eighty-six million, three hundred forty-two thousand, one hundred ninety-two".