20502531044868 has 12 divisors (see below), whose sum is σ = 47839239104720. Its totient is φ = 6834177014952.

The previous prime is 20502531044731. The next prime is 20502531044873. The reversal of 20502531044868 is 86844013520502.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×20502531044868² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 854272126858 + ... + 854272126881.

Almost surely, 2^{20502531044868} is an apocalyptic number.

It is an amenable number.

20502531044868 is an abundant number, since it is smaller than the sum of its proper divisors (27336708059852).

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

20502531044868 is a wasteful number, since it uses less digits than its factorization.

20502531044868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1708544253746 (or 1708544253744 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 48.

The spelling of 20502531044868 in words is "twenty trillion, five hundred two billion, five hundred thirty-one million, forty-four thousand, eight hundred sixty-eight".