18805405138914 has 64 divisors (see below), whose sum is σ = 39723904575360. Its totient is φ = 5918519093760.

The previous prime is 18805405138907. The next prime is 18805405138969. The reversal of 18805405138914 is 41983150450881.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 213369984 + ... + 213458100.

It is an arithmetic number, because the mean of its divisors is an integer number (620686008990).

Almost surely, 2^{18805405138914} is an apocalyptic number.

18805405138914 is an abundant number, since it is smaller than the sum of its proper divisors (20918499436446).

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

18805405138914 is a wasteful number, since it uses less digits than its factorization.

18805405138914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94435.

The product of its (nonzero) digits is 5529600, while the sum is 57.

The spelling of 18805405138914 in words is "eighteen trillion, eight hundred five billion, four hundred five million, one hundred thirty-eight thousand, nine hundred fourteen".