31980045724 has 48 divisors (see below), whose sum is σ = 61792004736. Its totient is φ = 14361134400.

The previous prime is 31980045701. The next prime is 31980045739. The reversal of 31980045724 is 42754008913.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1746979 + ... + 1765189.

It is an arithmetic number, because the mean of its divisors is an integer number (1287333432).

Almost surely, 2^31980045724 is an apocalyptic number.

It is an amenable number.

31980045724 is a deficient number, since it is larger than the sum of its proper divisors (29811959012).

31980045724 is a wasteful number, since it uses less digits than its factorization.

31980045724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18706 (or 18704 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 31980045724 in words is "thirty-one billion, nine hundred eighty million, forty-five thousand, seven hundred twenty-four".