18520500055 has 8 divisors (see below), whose sum is σ = 22588938144. Its totient is φ = 14573508000.

The previous prime is 18520500007. The next prime is 18520500067. The reversal of 18520500055 is 55000502581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18520500055 - 2²³ = 18512111447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30361171 + ... + 30361780.

It is an arithmetic number, because the mean of its divisors is an integer number (2823617268).

Almost surely, 2^18520500055 is an apocalyptic number.

18520500055 is a deficient number, since it is larger than the sum of its proper divisors (4068438089).

18520500055 is an equidigital number, since it uses as much as digits as its factorization.

18520500055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60723017.

The product of its (nonzero) digits is 10000, while the sum is 31.

The spelling of 18520500055 in words is "eighteen billion, five hundred twenty million, five hundred thousand, fifty-five".