31890624974 has 32 divisors (see below), whose sum is σ = 54246084480. Its totient is φ = 13939165152.

The previous prime is 31890624973. The next prime is 31890625037. The reversal of 31890624974 is 47942609813.

It is a super-2 number, since 2×31890624974² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31890624973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1631849 + ... + 1651275.

It is an arithmetic number, because the mean of its divisors is an integer number (1695190140).

Almost surely, 2^31890624974 is an apocalyptic number.

31890624974 is a deficient number, since it is larger than the sum of its proper divisors (22355459506).

31890624974 is a wasteful number, since it uses less digits than its factorization.

31890624974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22784.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 31890624974 in words is "thirty-one billion, eight hundred ninety million, six hundred twenty-four thousand, nine hundred seventy-four".