23178813 has 12 divisors (see below), whose sum is σ = 35951040. Its totient is φ = 13244952.

The previous prime is 23178809. The next prime is 23178821. The reversal of 23178813 is 31887132.

It is not a de Polignac number, because 23178813 - 2² = 23178809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23178833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78693 + ... + 78986.

It is an arithmetic number, because the mean of its divisors is an integer number (2995920).

Almost surely, 2^23178813 is an apocalyptic number.

It is an amenable number.

23178813 is a deficient number, since it is larger than the sum of its proper divisors (12772227).

23178813 is a wasteful number, since it uses less digits than its factorization.

23178813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157696 (or 157689 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 23178813 is about 4814.4379734295. The cubic root of 23178813 is about 285.1217823648.

The spelling of 23178813 in words is "twenty-three million, one hundred seventy-eight thousand, eight hundred thirteen".