18857575855 has 4 divisors (see below), whose sum is σ = 22629091032. Its totient is φ = 15086060680.

The previous prime is 18857575837. The next prime is 18857575927. The reversal of 18857575855 is 55857575881.

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

It is not a de Polignac number, because 18857575855 - 2⁷ = 18857575727 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 (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1885757581 + ... + 1885757590.

It is an arithmetic number, because the mean of its divisors is an integer number (5657272758).

Almost surely, 2^18857575855 is an apocalyptic number.

18857575855 is a deficient number, since it is larger than the sum of its proper divisors (3771515177).

18857575855 is an equidigital number, since it uses as much as digits as its factorization.

18857575855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3771515176.

The product of its digits is 78400000, while the sum is 64.

The spelling of 18857575855 in words is "eighteen billion, eight hundred fifty-seven million, five hundred seventy-five thousand, eight hundred fifty-five".