31820664028 has 12 divisors (see below), whose sum is σ = 56517299272. Its totient is φ = 15672864240.

The previous prime is 31820664019. The next prime is 31820664101. The reversal of 31820664028 is 82046602813.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59366643 + ... + 59367178.

Almost surely, 2^31820664028 is an apocalyptic number.

It is an amenable number.

31820664028 is a deficient number, since it is larger than the sum of its proper divisors (24696635244).

31820664028 is a wasteful number, since it uses less digits than its factorization.

31820664028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118733892 (or 118733890 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 31820664028 in words is "thirty-one billion, eight hundred twenty million, six hundred sixty-four thousand, twenty-eight".