18887091116 has 12 divisors (see below), whose sum is σ = 34192147920. Its totient is φ = 9117906000.

The previous prime is 18887091089. The next prime is 18887091133. The reversal of 18887091116 is 61119078881.

It is a happy number.

It is a super-2 number, since 2×18887091116² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81409760 + ... + 81409991.

It is an arithmetic number, because the mean of its divisors is an integer number (2849345660).

Almost surely, 2^18887091116 is an apocalyptic number.

It is an amenable number.

18887091116 is a deficient number, since it is larger than the sum of its proper divisors (15305056804).

18887091116 is a wasteful number, since it uses less digits than its factorization.

18887091116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162819784 (or 162819782 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 50.

The spelling of 18887091116 in words is "eighteen billion, eight hundred eighty-seven million, ninety-one thousand, one hundred sixteen".