31504384988 has 24 divisors (see below), whose sum is σ = 56472873072. Its totient is φ = 15370032384.

The previous prime is 31504384981. The next prime is 31504385053. The reversal of 31504384988 is 88948340513.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31504384981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74306 + ... + 261782.

It is an arithmetic number, because the mean of its divisors is an integer number (2353036378).

Almost surely, 2^31504384988 is an apocalyptic number.

It is an amenable number.

31504384988 is a deficient number, since it is larger than the sum of its proper divisors (24968488084).

31504384988 is a wasteful number, since it uses less digits than its factorization.

31504384988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188501 (or 188499 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 53.

The spelling of 31504384988 in words is "thirty-one billion, five hundred four million, three hundred eighty-four thousand, nine hundred eighty-eight".