21631630567463 has 16 divisors (see below), whose sum is σ = 25419399255360. Its totient is φ = 18024664859136.

The previous prime is 21631630567451. The next prime is 21631630567579. The reversal of 21631630567463 is 36476503613612.

It is a cyclic number.

It is not a de Polignac number, because 21631630567463 - 2²⁴ = 21631613790247 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21631630567363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267419570 + ... + 267500447.

It is an arithmetic number, because the mean of its divisors is an integer number (1588712453460).

Almost surely, 2^{21631630567463} is an apocalyptic number.

21631630567463 is a deficient number, since it is larger than the sum of its proper divisors (3787768687897).

21631630567463 is a wasteful number, since it uses less digits than its factorization.

21631630567463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534920186.

The product of its (nonzero) digits is 9797760, while the sum is 53.

The spelling of 21631630567463 in words is "twenty-one trillion, six hundred thirty-one billion, six hundred thirty million, five hundred sixty-seven thousand, four hundred sixty-three".