20504136718368 has 72 divisors (see below), whose sum is σ = 58310441280000. Its totient is φ = 6834500959104.

The previous prime is 20504136718319. The next prime is 20504136718421. The reversal of 20504136718368 is 86381763140502.

20504136718368 is a `hidden beast` number, since 2 + 0 + 5 + 0 + 41 + 367 + 183 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×20504136718368² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8373633 + ... + 10541631.

It is an arithmetic number, because the mean of its divisors is an integer number (809867240000).

Almost surely, 2^{20504136718368} is an apocalyptic number.

It is an amenable number.

20504136718368 is an abundant number, since it is smaller than the sum of its proper divisors (37806304561632).

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

20504136718368 is a wasteful number, since it uses less digits than its factorization.

20504136718368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200854 (or 2200843 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 20504136718368 in words is "twenty trillion, five hundred four billion, one hundred thirty-six million, seven hundred eighteen thousand, three hundred sixty-eight".