18636296718 has 32 divisors (see below), whose sum is σ = 42252336000. Its totient is φ = 5432442336.

The previous prime is 18636296713. The next prime is 18636296759. The reversal of 18636296718 is 81769263681.

It is a super-2 number, since 2×18636296718² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18636296713) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6286068 + ... + 6289031.

It is an arithmetic number, because the mean of its divisors is an integer number (1320385500).

Almost surely, 2^18636296718 is an apocalyptic number.

18636296718 is an abundant number, since it is smaller than the sum of its proper divisors (23616039282).

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

18636296718 is a wasteful number, since it uses less digits than its factorization.

18636296718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12575136.

The product of its digits is 5225472, while the sum is 57.

The spelling of 18636296718 in words is "eighteen billion, six hundred thirty-six million, two hundred ninety-six thousand, seven hundred eighteen".