18008906568 has 16 divisors (see below), whose sum is σ = 45022266480. Its totient is φ = 6002968848.

The previous prime is 18008906567. The next prime is 18008906603. The reversal of 18008906568 is 86560980081.

It is a self number, because there is not a number n which added to its sum of digits gives 18008906568.

It is not an unprimeable number, because it can be changed into a prime (18008906561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375185530 + ... + 375185577.

It is an arithmetic number, because the mean of its divisors is an integer number (2813891655).

Almost surely, 2^18008906568 is an apocalyptic number.

It is an amenable number.

18008906568 is an abundant number, since it is smaller than the sum of its proper divisors (27013359912).

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

18008906568 is a wasteful number, since it uses less digits than its factorization.

18008906568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750371116 (or 750371112 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 51.

The spelling of 18008906568 in words is "eighteen billion, eight million, nine hundred six thousand, five hundred sixty-eight".