18008717860 has 48 divisors (see below), whose sum is σ = 43307018496. Its totient is φ = 6162118272.

The previous prime is 18008717851. The next prime is 18008717927. The reversal of 18008717860 is 6871780081.

It is a super-2 number, since 2×18008717860² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18008717860.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57447 + ... + 198286.

It is an arithmetic number, because the mean of its divisors is an integer number (902229552).

Almost surely, 2^18008717860 is an apocalyptic number.

18008717860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18008717860 is an abundant number, since it is smaller than the sum of its proper divisors (25298300636).

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

18008717860 is a wasteful number, since it uses less digits than its factorization.

18008717860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256252 (or 256250 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 46.

The spelling of 18008717860 in words is "eighteen billion, eight million, seven hundred seventeen thousand, eight hundred sixty".