20500016115560 has 64 divisors (see below), whose sum is σ = 46882208252880. Its totient is φ = 8065403965440.

The previous prime is 20500016115559. The next prime is 20500016115587. The reversal of 20500016115560 is 6551161000502.

It can be written as a sum of positive squares in 8 ways, for example, as 26798344804 + 20473217770756 = 163702^2 + 4524734^2 .

It is a super-2 number, since 2×20500016115560² (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 15 ways as a sum of consecutive naturals, for example, 214313504 + ... + 214409136.

Almost surely, 2^{20500016115560} is an apocalyptic number.

20500016115560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20500016115560 is an abundant number, since it is smaller than the sum of its proper divisors (26382192137320).

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

20500016115560 is a wasteful number, since it uses less digits than its factorization.

20500016115560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183558 (or 183554 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 32.

The spelling of 20500016115560 in words is "twenty trillion, five hundred billion, sixteen million, one hundred fifteen thousand, five hundred sixty".