18364616015 has 4 divisors (see below), whose sum is σ = 22037539224. Its totient is φ = 14691692808.

The previous prime is 18364615979. The next prime is 18364616021. The reversal of 18364616015 is 51061646381.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18364616015 - 2²⁴ = 18347838799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1836461597 + ... + 1836461606.

It is an arithmetic number, because the mean of its divisors is an integer number (5509384806).

Almost surely, 2^18364616015 is an apocalyptic number.

18364616015 is a deficient number, since it is larger than the sum of its proper divisors (3672923209).

18364616015 is an equidigital number, since it uses as much as digits as its factorization.

18364616015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3672923208.

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 18364616015 in words is "eighteen billion, three hundred sixty-four million, six hundred sixteen thousand, fifteen".