18518870052 has 24 divisors (see below), whose sum is σ = 48011885600. Its totient is φ = 6172956648.

The previous prime is 18518870039. The next prime is 18518870053. The reversal of 18518870052 is 25007881581.

18518870052 is a `hidden beast` number, since 1 + 8 + 518 + 87 + 0 + 0 + 52 = 666.

It is not an unprimeable number, because it can be changed into a prime (18518870053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85735402 + ... + 85735617.

Almost surely, 2^18518870052 is an apocalyptic number.

18518870052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18518870052 is an abundant number, since it is smaller than the sum of its proper divisors (29493015548).

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

18518870052 is a wasteful number, since it uses less digits than its factorization.

18518870052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171471032 (or 171471024 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 45.

The spelling of 18518870052 in words is "eighteen billion, five hundred eighteen million, eight hundred seventy thousand, fifty-two".