20188713637631 has 64 divisors (see below), whose sum is σ = 26406096076800. Its totient is φ = 14980143144960.

The previous prime is 20188713637627. The next prime is 20188713637643. The reversal of 20188713637631 is 13673631788102.

It is not a de Polignac number, because 20188713637631 - 2² = 20188713637627 is a prime.

It is a super-2 number, since 2×20188713637631² (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 (20188713637231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 39741170 + ... + 40245968.

It is an arithmetic number, because the mean of its divisors is an integer number (412595251200).

Almost surely, 2^{20188713637631} is an apocalyptic number.

20188713637631 is a deficient number, since it is larger than the sum of its proper divisors (6217382439169).

20188713637631 is a wasteful number, since it uses less digits than its factorization.

20188713637631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505164.

The product of its (nonzero) digits is 6096384, while the sum is 56.

The spelling of 20188713637631 in words is "twenty trillion, one hundred eighty-eight billion, seven hundred thirteen million, six hundred thirty-seven thousand, six hundred thirty-one".