31689586942 has 16 divisors (see below), whose sum is σ = 51403291632. Its totient is φ = 14565271680.

The previous prime is 31689586927. The next prime is 31689587003. The reversal of 31689586942 is 24968598613.

It is a super-2 number, since 2×31689586942² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 2522428 + ... + 2534959.

It is an arithmetic number, because the mean of its divisors is an integer number (3212705727).

Almost surely, 2^31689586942 is an apocalyptic number.

31689586942 is a deficient number, since it is larger than the sum of its proper divisors (19713704690).

31689586942 is a wasteful number, since it uses less digits than its factorization.

31689586942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5057643.

The product of its digits is 22394880, while the sum is 61.

The spelling of 31689586942 in words is "thirty-one billion, six hundred eighty-nine million, five hundred eighty-six thousand, nine hundred forty-two".