18516489924 has 12 divisors (see below), whose sum is σ = 43205143184. Its totient is φ = 6172163304.

The previous prime is 18516489899. The next prime is 18516489949. The reversal of 18516489924 is 42998461581.

It is an interprime number because it is at equal distance from previous prime (18516489899) and next prime (18516489949).

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771520402 + ... + 771520425.

Almost surely, 2^18516489924 is an apocalyptic number.

It is an amenable number.

18516489924 is an abundant number, since it is smaller than the sum of its proper divisors (24688653260).

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

18516489924 is a wasteful number, since it uses less digits than its factorization.

18516489924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543040834 (or 1543040832 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 57.

The spelling of 18516489924 in words is "eighteen billion, five hundred sixteen million, four hundred eighty-nine thousand, nine hundred twenty-four".