20800516630656 has 64 divisors (see below), whose sum is σ = 63144425494080. Its totient is φ = 5943004750848.

The previous prime is 20800516630627. The next prime is 20800516630711. The reversal of 20800516630656 is 65603661500802.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×20800516630656² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3869141031 + ... + 3869146406.

It is an arithmetic number, because the mean of its divisors is an integer number (986631648345).

Almost surely, 2^{20800516630656} is an apocalyptic number.

It is an amenable number.

20800516630656 is an abundant number, since it is smaller than the sum of its proper divisors (42343908863424).

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

20800516630656 is an equidigital number, since it uses as much as digits as its factorization.

20800516630656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7738287461 (or 7738287449 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 20800516630656 in words is "twenty trillion, eight hundred billion, five hundred sixteen million, six hundred thirty thousand, six hundred fifty-six".