23838360021 has 48 divisors (see below), whose sum is σ = 41368955264. Its totient is φ = 13435248384.

The previous prime is 23838360011. The next prime is 23838360079. The reversal of 23838360021 is 12006383832.

23838360021 is a `hidden beast` number, since 23 + 8 + 3 + 8 + 3 + 600 + 21 = 666.

It is not a de Polignac number, because 23838360021 - 2⁵ = 23838359989 is a prime.

It is a super-2 number, since 2×23838360021² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23838360001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28185 + ... + 220161.

Almost surely, 2^23838360021 is an apocalyptic number.

23838360021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23838360021 is a deficient number, since it is larger than the sum of its proper divisors (17530595243).

23838360021 is an equidigital number, since it uses as much as digits as its factorization.

23838360021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192072 (or 192060 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 23838360021 in words is "twenty-three billion, eight hundred thirty-eight million, three hundred sixty thousand, twenty-one".