18855914903 has 4 divisors (see below), whose sum is σ = 21549617040. Its totient is φ = 16162212768.

The previous prime is 18855914897. The next prime is 18855914911. The reversal of 18855914903 is 30941955881.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18855914903 - 2⁸ = 18855914647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18855914003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1346851058 + ... + 1346851071.

It is an arithmetic number, because the mean of its divisors is an integer number (5387404260).

Almost surely, 2^18855914903 is an apocalyptic number.

18855914903 is a deficient number, since it is larger than the sum of its proper divisors (2693702137).

18855914903 is an equidigital number, since it uses as much as digits as its factorization.

18855914903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2693702136.

The product of its (nonzero) digits is 1555200, while the sum is 53.

The spelling of 18855914903 in words is "eighteen billion, eight hundred fifty-five million, nine hundred fourteen thousand, nine hundred three".