18573479136 has 72 divisors (see below), whose sum is σ = 53285843520. Its totient is φ = 6136359936.

The previous prime is 18573479117. The next prime is 18573479161. The reversal of 18573479136 is 63197437581.

18573479136 is a `hidden beast` number, since 18 + 573 + 47 + 9 + 13 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 252816 + ... + 317903.

It is an arithmetic number, because the mean of its divisors is an integer number (740081160).

Almost surely, 2^18573479136 is an apocalyptic number.

18573479136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18573479136 is an abundant number, since it is smaller than the sum of its proper divisors (34712364384).

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

18573479136 is a wasteful number, since it uses less digits than its factorization.

18573479136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570848 (or 570837 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The spelling of 18573479136 in words is "eighteen billion, five hundred seventy-three million, four hundred seventy-nine thousand, one hundred thirty-six".