23913018 has 12 divisors (see below), whose sum is σ = 51811578. Its totient is φ = 7971000.

The previous prime is 23913011. The next prime is 23913041. The reversal of 23913018 is 81031932.

It can be written as a sum of positive squares in only one way, i.e., 23299929 + 613089 = 4827^2 + 783^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23912982 and 23913000.

It is not an unprimeable number, because it can be changed into a prime (23913011) 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 5 ways as a sum of consecutive naturals, for example, 664233 + ... + 664268.

Almost surely, 2^23913018 is an apocalyptic number.

23913018 is an abundant number, since it is smaller than the sum of its proper divisors (27898560).

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

23913018 is a wasteful number, since it uses less digits than its factorization.

23913018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328509 (or 1328506 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 23913018 is about 4890.0938641298. The cubic root of 23913018 is about 288.1010206955.

The spelling of 23913018 in words is "twenty-three million, nine hundred thirteen thousand, eighteen".