18187059204 has 36 divisors (see below), whose sum is σ = 48677130684. Its totient is φ = 5705743872.

The previous prime is 18187059197. The next prime is 18187059211. The reversal of 18187059204 is 40295078181.

It is an interprime number because it is at equal distance from previous prime (18187059197) and next prime (18187059211).

It can be written as a sum of positive squares in 2 ways, for example, as 8308687104 + 9878372100 = 91152^2 + 99390^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×18187059204² (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 18187059204.

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, 14858097 + ... + 14859320.

It is an arithmetic number, because the mean of its divisors is an integer number (1352142519).

Almost surely, 2^18187059204 is an apocalyptic number.

It is an amenable number.

18187059204 is an abundant number, since it is smaller than the sum of its proper divisors (30490071480).

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

18187059204 is a wasteful number, since it uses less digits than its factorization.

18187059204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29717444 (or 29717439 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 18187059204 in words is "eighteen billion, one hundred eighty-seven million, fifty-nine thousand, two hundred four".