18855674158 has 4 divisors (see below), whose sum is σ = 28283511240. Its totient is φ = 9427837078.

The previous prime is 18855674129. The next prime is 18855674221. The reversal of 18855674158 is 85147655881.

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

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4713918538 + ... + 4713918541.

It is an arithmetic number, because the mean of its divisors is an integer number (7070877810).

Almost surely, 2^18855674158 is an apocalyptic number.

18855674158 is a deficient number, since it is larger than the sum of its proper divisors (9427837082).

18855674158 is an equidigital number, since it uses as much as digits as its factorization.

18855674158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9427837081.

The product of its digits is 10752000, while the sum is 58.

The spelling of 18855674158 in words is "eighteen billion, eight hundred fifty-five million, six hundred seventy-four thousand, one hundred fifty-eight".