20077200557631 has 96 divisors (see below), whose sum is σ = 34940021695488. Its totient is φ = 11282761693440.

The previous prime is 20077200557599. The next prime is 20077200557681. The reversal of 20077200557631 is 13675500277002.

20077200557631 is a `hidden beast` number, since 2 + 0 + 0 + 7 + 7 + 2 + 0 + 0 + 5 + 5 + 7 + 631 = 666.

It is not a de Polignac number, because 20077200557631 - 2⁵ = 20077200557599 is a prime.

It is a super-2 number, since 2×20077200557631² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20077200557681) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 857365435 + ... + 857388851.

It is an arithmetic number, because the mean of its divisors is an integer number (363958559328).

Almost surely, 2^{20077200557631} is an apocalyptic number.

20077200557631 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20077200557631 is a deficient number, since it is larger than the sum of its proper divisors (14862821137857).

20077200557631 is an equidigital number, since it uses as much as digits as its factorization.

20077200557631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31763 (or 31751 counting only the distinct ones).

The product of its (nonzero) digits is 617400, while the sum is 45.

The spelling of 20077200557631 in words is "twenty trillion, seventy-seven billion, two hundred million, five hundred fifty-seven thousand, six hundred thirty-one".