18188221104 has 60 divisors (see below), whose sum is σ = 51157626000. Its totient is φ = 6032264832.

The previous prime is 18188221081. The next prime is 18188221111. The reversal of 18188221104 is 40112288181.

It is a super-2 number, since 2×18188221104² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 288699 + ... + 346010.

It is an arithmetic number, because the mean of its divisors is an integer number (852627100).

Almost surely, 2^18188221104 is an apocalyptic number.

It is an amenable number.

18188221104 is an abundant number, since it is smaller than the sum of its proper divisors (32969404896).

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

18188221104 is a wasteful number, since it uses less digits than its factorization.

18188221104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634922 (or 634913 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 36.

The spelling of 18188221104 in words is "eighteen billion, one hundred eighty-eight million, two hundred twenty-one thousand, one hundred four".