18117738886 has 16 divisors (see below), whose sum is σ = 29414196000. Its totient is φ = 8320010688.

The previous prime is 18117738869. The next prime is 18117738901. The reversal of 18117738886 is 68883771181.

It is a self number, because there is not a number n which added to its sum of digits gives 18117738886.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1745671 + ... + 1756018.

It is an arithmetic number, because the mean of its divisors is an integer number (1838387250).

Almost surely, 2^18117738886 is an apocalyptic number.

18117738886 is a deficient number, since it is larger than the sum of its proper divisors (11296457114).

18117738886 is a wasteful number, since it uses less digits than its factorization.

18117738886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3501903.

The product of its digits is 3612672, while the sum is 58.

The spelling of 18117738886 in words is "eighteen billion, one hundred seventeen million, seven hundred thirty-eight thousand, eight hundred eighty-six".