20411715721631 has 8 divisors (see below), whose sum is σ = 22187285530704. Its totient is φ = 18665494174080.

The previous prime is 20411715721609. The next prime is 20411715721651. The reversal of 20411715721631 is 13612751711402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20411715721631 - 2⁶ = 20411715721567 is a prime.

It is a super-2 number, since 2×20411715721631² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20411715721651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7337063930 + ... + 7337066711.

It is an arithmetic number, because the mean of its divisors is an integer number (2773410691338).

Almost surely, 2^{20411715721631} is an apocalyptic number.

20411715721631 is a deficient number, since it is larger than the sum of its proper divisors (1775569809073).

20411715721631 is a wasteful number, since it uses less digits than its factorization.

20411715721631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14674130761.

The product of its (nonzero) digits is 70560, while the sum is 41.

The spelling of 20411715721631 in words is "twenty trillion, four hundred eleven billion, seven hundred fifteen million, seven hundred twenty-one thousand, six hundred thirty-one".