23131264635 has 64 divisors (see below), whose sum is σ = 42665356800. Its totient is φ = 11876247936.

The previous prime is 23131264631. The next prime is 23131264687. The reversal of 23131264635 is 53646213132.

23131264635 is a `hidden beast` number, since 2 + 3 + 1 + 3 + 1 + 2 + 646 + 3 + 5 = 666.

It is not a de Polignac number, because 23131264635 - 2² = 23131264631 is a prime.

It is a super-2 number, since 2×23131264635² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23131264635.

It is not an unprimeable number, because it can be changed into a prime (23131264631) 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, 1349992 + ... + 1367018.

It is an arithmetic number, because the mean of its divisors is an integer number (666646200).

Almost surely, 2^23131264635 is an apocalyptic number.

23131264635 is a deficient number, since it is larger than the sum of its proper divisors (19534092165).

23131264635 is a wasteful number, since it uses less digits than its factorization.

23131264635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17417 (or 17411 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

Adding to 23131264635 its reverse (53646213132), we get a palindrome (76777477767).

The spelling of 23131264635 in words is "twenty-three billion, one hundred thirty-one million, two hundred sixty-four thousand, six hundred thirty-five".