23181872 has 40 divisors (see below), whose sum is σ = 51591936. Its totient is φ = 9884736.

The previous prime is 23181797. The next prime is 23181883. The reversal of 23181872 is 27818132.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29063 + ... + 29849.

Almost surely, 2^23181872 is an apocalyptic number.

It is an amenable number.

23181872 is an abundant number, since it is smaller than the sum of its proper divisors (28410064).

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

23181872 is a wasteful number, since it uses less digits than its factorization.

23181872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065 (or 1059 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 23181872 is about 4814.7556531978. The cubic root of 23181872 is about 285.1343246977.

The spelling of 23181872 in words is "twenty-three million, one hundred eighty-one thousand, eight hundred seventy-two".