18165038118 has 128 divisors (see below), whose sum is σ = 41057280000. Its totient is φ = 5327596032.

The previous prime is 18165038093. The next prime is 18165038153. The reversal of 18165038118 is 81183056181.

It is a self number, because there is not a number n which added to its sum of digits gives 18165038118.

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 63 ways as a sum of consecutive naturals, for example, 36402633 + ... + 36403131.

It is an arithmetic number, because the mean of its divisors is an integer number (320760000).

Almost surely, 2^18165038118 is an apocalyptic number.

18165038118 is an abundant number, since it is smaller than the sum of its proper divisors (22892241882).

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

18165038118 is a wasteful number, since it uses less digits than its factorization.

18165038118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866.

The product of its (nonzero) digits is 46080, while the sum is 42.

The spelling of 18165038118 in words is "eighteen billion, one hundred sixty-five million, thirty-eight thousand, one hundred eighteen".