23131916 has 12 divisors (see below), whose sum is σ = 40544280. Its totient is φ = 11547840.

The previous prime is 23131897. The next prime is 23131931. The reversal of 23131916 is 61913132.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1421 + ... + 6948.

It is an arithmetic number, because the mean of its divisors is an integer number (3378690).

Almost surely, 2^23131916 is an apocalyptic number.

It is an amenable number.

23131916 is a deficient number, since it is larger than the sum of its proper divisors (17412364).

23131916 is a wasteful number, since it uses less digits than its factorization.

23131916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9064 (or 9062 counting only the distinct ones).

The product of its digits is 972, while the sum is 26.

The square root of 23131916 is about 4809.5650530999. The cubic root of 23131916 is about 284.9293597368.

The spelling of 23131916 in words is "twenty-three million, one hundred thirty-one thousand, nine hundred sixteen".