21632461317531 has 12 divisors (see below), whose sum is σ = 31247031602280. Its totient is φ = 14421574863360.

The previous prime is 21632461317517. The next prime is 21632461317589. The reversal of 21632461317531 is 13571316423612.

21632461317531 is a `hidden beast` number, since 2 + 1 + 6 + 3 + 24 + 61 + 31 + 7 + 531 = 666.

It is not a de Polignac number, because 21632461317531 - 2¹⁰ = 21632461316507 is a prime.

It is a super-2 number, since 2×21632461317531² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21632461387531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3382950 + ... + 7396571.

It is an arithmetic number, because the mean of its divisors is an integer number (2603919300190).

Almost surely, 2^{21632461317531} is an apocalyptic number.

21632461317531 is a deficient number, since it is larger than the sum of its proper divisors (9614570284749).

21632461317531 is a wasteful number, since it uses less digits than its factorization.

21632461317531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11002506 (or 11002503 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The spelling of 21632461317531 in words is "twenty-one trillion, six hundred thirty-two billion, four hundred sixty-one million, three hundred seventeen thousand, five hundred thirty-one".