18464519718 has 24 divisors (see below), whose sum is σ = 40569933456. Its totient is φ = 6068151600.

The previous prime is 18464519659. The next prime is 18464519737. The reversal of 18464519718 is 81791546481.

18464519718 is a `hidden beast` number, since 18 + 46 + 4 + 519 + 71 + 8 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7222713 + ... + 7225268.

It is an arithmetic number, because the mean of its divisors is an integer number (1690413894).

Almost surely, 2^18464519718 is an apocalyptic number.

18464519718 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18464519718 is an abundant number, since it is smaller than the sum of its proper divisors (22105413738).

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

18464519718 is a wasteful number, since it uses less digits than its factorization.

18464519718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14448060 (or 14448057 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The spelling of 18464519718 in words is "eighteen billion, four hundred sixty-four million, five hundred nineteen thousand, seven hundred eighteen".