18518501860404 has 72 divisors (see below), whose sum is σ = 54131005460448. Its totient is φ = 4884000488640.

The previous prime is 18518501860367. The next prime is 18518501860477. The reversal of 18518501860404 is 40406810581581.

It is a happy number.

It is a super-2 number, since 2×18518501860404² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1211302002 + ... + 1211317289.

It is an arithmetic number, because the mean of its divisors is an integer number (751819520284).

Almost surely, 2^{18518501860404} is an apocalyptic number.

18518501860404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18518501860404 is an abundant number, since it is smaller than the sum of its proper divisors (35612503600044).

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

18518501860404 is a wasteful number, since it uses less digits than its factorization.

18518501860404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2422619325 (or 2422619316 counting only the distinct ones).

The product of its (nonzero) digits is 1228800, while the sum is 51.

The spelling of 18518501860404 in words is "eighteen trillion, five hundred eighteen billion, five hundred one million, eight hundred sixty thousand, four hundred four".