18368518536 has 48 divisors (see below), whose sum is σ = 51352853760. Its totient is φ = 5925327840.

The previous prime is 18368518523. The next prime is 18368518541. The reversal of 18368518536 is 63581586381.

18368518536 is a `hidden beast` number, since 18 + 3 + 6 + 85 + 18 + 536 = 666.

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, 4112580 + ... + 4117043.

It is an arithmetic number, because the mean of its divisors is an integer number (1069851120).

Almost surely, 2^18368518536 is an apocalyptic number.

It is an amenable number.

18368518536 is an abundant number, since it is smaller than the sum of its proper divisors (32984335224).

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

18368518536 is a wasteful number, since it uses less digits than its factorization.

18368518536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8229666 (or 8229659 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 54.

The spelling of 18368518536 in words is "eighteen billion, three hundred sixty-eight million, five hundred eighteen thousand, five hundred thirty-six".