23638194721836 has 54 divisors (see below), whose sum is σ = 59771814389196. Its totient is φ = 7876799834400.

The previous prime is 23638194721819. The next prime is 23638194721847. The reversal of 23638194721836 is 63812749183632.

It is a happy number.

23638194721836 is a `hidden beast` number, since 2 + 3 + 6 + 3 + 81 + 9 + 472 + 1 + 83 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 364242951 + ... + 364307841.

Almost surely, 2^{23638194721836} is an apocalyptic number.

It is an amenable number.

23638194721836 is an abundant number, since it is smaller than the sum of its proper divisors (36133619667360).

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

23638194721836 is an equidigital number, since it uses as much as digits as its factorization.

23638194721836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71263 (or 68077 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 63.

The spelling of 23638194721836 in words is "twenty-three trillion, six hundred thirty-eight billion, one hundred ninety-four million, seven hundred twenty-one thousand, eight hundred thirty-six".