23531534136 has 48 divisors (see below), whose sum is σ = 69524989560. Its totient is φ = 7130767680.

The previous prime is 23531534129. The next prime is 23531534141. The reversal of 23531534136 is 63143513532.

23531534136 is a `hidden beast` number, since 2 + 3 + 531 + 53 + 41 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 23531534136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14854975 + ... + 14856558.

Almost surely, 2^23531534136 is an apocalyptic number.

It is an amenable number.

23531534136 is an abundant number, since it is smaller than the sum of its proper divisors (45993455424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23531534136 is a wasteful number, since it uses less digits than its factorization.

23531534136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29711556 (or 29711549 counting only the distinct ones).

The product of its digits is 97200, while the sum is 36.

The spelling of 23531534136 in words is "twenty-three billion, five hundred thirty-one million, five hundred thirty-four thousand, one hundred thirty-six".