18392489855 has 4 divisors (see below), whose sum is σ = 22070987832. Its totient is φ = 14713991880.

The previous prime is 18392489849. The next prime is 18392489893. The reversal of 18392489855 is 55898429381.

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

It is not a de Polignac number, because 18392489855 - 2¹⁰ = 18392488831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1839248981 + ... + 1839248990.

It is an arithmetic number, because the mean of its divisors is an integer number (5517746958).

Almost surely, 2^18392489855 is an apocalyptic number.

18392489855 is a deficient number, since it is larger than the sum of its proper divisors (3678497977).

18392489855 is an equidigital number, since it uses as much as digits as its factorization.

18392489855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3678497976.

The product of its digits is 24883200, while the sum is 62.

The spelling of 18392489855 in words is "eighteen billion, three hundred ninety-two million, four hundred eighty-nine thousand, eight hundred fifty-five".