31620943396 has 12 divisors (see below), whose sum is σ = 63241886848. Its totient is φ = 13551832872.

The previous prime is 31620943303. The next prime is 31620943397. The reversal of 31620943396 is 69334902613.

31620943396 is an admirable number.

It is a super-2 number, since 2×31620943396² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (31620943397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564659676 + ... + 564659731.

Almost surely, 2^31620943396 is an apocalyptic number.

It is an amenable number.

31620943396 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31620943396 is a wasteful number, since it uses less digits than its factorization.

31620943396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129319418 (or 1129319416 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 46.

The spelling of 31620943396 in words is "thirty-one billion, six hundred twenty million, nine hundred forty-three thousand, three hundred ninety-six".