23131029972 has 12 divisors (see below), whose sum is σ = 53972403296. Its totient is φ = 7710343320.

The previous prime is 23131029959. The next prime is 23131029997. The reversal of 23131029972 is 27992013132.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 23131029972.

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 3 ways as a sum of consecutive naturals, for example, 963792904 + ... + 963792927.

Almost surely, 2^23131029972 is an apocalyptic number.

It is an amenable number.

23131029972 is an abundant number, since it is smaller than the sum of its proper divisors (30841373324).

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

23131029972 is a wasteful number, since it uses less digits than its factorization.

23131029972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927585838 (or 1927585836 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 39.

The spelling of 23131029972 in words is "twenty-three billion, one hundred thirty-one million, twenty-nine thousand, nine hundred seventy-two".