23131604 has 12 divisors (see below), whose sum is σ = 40604928. Its totient is φ = 11530200.

The previous prime is 23131601. The next prime is 23131609. The reversal of 23131604 is 40613132.

It is a super-2 number, since 2×23131604² = 1070142207225632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7412 + ... + 10059.

It is an arithmetic number, because the mean of its divisors is an integer number (3383744).

Almost surely, 2^23131604 is an apocalyptic number.

It is an amenable number.

23131604 is a deficient number, since it is larger than the sum of its proper divisors (17473324).

23131604 is a wasteful number, since it uses less digits than its factorization.

23131604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17806 (or 17804 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 23131604 is about 4809.5326176251. The cubic root of 23131604 is about 284.9280787021.

Adding to 23131604 its reverse (40613132), we get a palindrome (63744736).

The spelling of 23131604 in words is "twenty-three million, one hundred thirty-one thousand, six hundred four".