18364155038 has 32 divisors (see below), whose sum is σ = 30153358080. Its totient is φ = 8350433280.

The previous prime is 18364155031. The next prime is 18364155049. The reversal of 18364155038 is 83055146381.

It is a self number, because there is not a number n which added to its sum of digits gives 18364155038.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18364155031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 696398 + ... + 722286.

It is an arithmetic number, because the mean of its divisors is an integer number (942292440).

Almost surely, 2^18364155038 is an apocalyptic number.

18364155038 is a deficient number, since it is larger than the sum of its proper divisors (11789203042).

18364155038 is a wasteful number, since it uses less digits than its factorization.

18364155038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26612.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 18364155038 in words is "eighteen billion, three hundred sixty-four million, one hundred fifty-five thousand, thirty-eight".