18851685055 has 16 divisors (see below), whose sum is σ = 26057318400. Its totient is φ = 12825080352.

The previous prime is 18851685049. The next prime is 18851685059. The reversal of 18851685055 is 55058615881.

It is not a de Polignac number, because 18851685055 - 2²⁵ = 18818130623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18851684993 and 18851685011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18851685059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2116105 + ... + 2124994.

It is an arithmetic number, because the mean of its divisors is an integer number (1628582400).

Almost surely, 2^18851685055 is an apocalyptic number.

18851685055 is a deficient number, since it is larger than the sum of its proper divisors (7205633345).

18851685055 is a wasteful number, since it uses less digits than its factorization.

18851685055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4241238.

The product of its (nonzero) digits is 1920000, while the sum is 52.

The spelling of 18851685055 in words is "eighteen billion, eight hundred fifty-one million, six hundred eighty-five thousand, fifty-five".