18538837055 has 4 divisors (see below), whose sum is σ = 22246604472. Its totient is φ = 14831069640.

The previous prime is 18538837019. The next prime is 18538837063. The reversal of 18538837055 is 55073883581.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 18538837055 - 2³⁴ = 1358967871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18538836988 and 18538837006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1853883701 + ... + 1853883710.

It is an arithmetic number, because the mean of its divisors is an integer number (5561651118).

Almost surely, 2^18538837055 is an apocalyptic number.

18538837055 is a deficient number, since it is larger than the sum of its proper divisors (3707767417).

18538837055 is an equidigital number, since it uses as much as digits as its factorization.

18538837055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3707767416.

The product of its (nonzero) digits is 4032000, while the sum is 53.

The spelling of 18538837055 in words is "eighteen billion, five hundred thirty-eight million, eight hundred thirty-seven thousand, fifty-five".