18361662536 has 32 divisors (see below), whose sum is σ = 39352362240. Its totient is φ = 7868095488.

The previous prime is 18361662523. The next prime is 18361662541. The reversal of 18361662536 is 63526616381.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420065 + ... + 461711.

It is an arithmetic number, because the mean of its divisors is an integer number (1229761320).

Almost surely, 2^18361662536 is an apocalyptic number.

It is an amenable number.

18361662536 is an abundant number, since it is smaller than the sum of its proper divisors (20990699704).

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

18361662536 is a wasteful number, since it uses less digits than its factorization.

18361662536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49533 (or 49529 counting only the distinct ones).

The product of its digits is 933120, while the sum is 47.

The spelling of 18361662536 in words is "eighteen billion, three hundred sixty-one million, six hundred sixty-two thousand, five hundred thirty-six".