18855914955 has 16 divisors (see below), whose sum is σ = 30173266464. Its totient is φ = 10055220480.

The previous prime is 18855914929. The next prime is 18855914969. The reversal of 18855914955 is 55941955881.

It is not a de Polignac number, because 18855914955 - 2¹⁹ = 18855390667 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50625 + ... + 200685.

It is an arithmetic number, because the mean of its divisors is an integer number (1885829154).

Almost surely, 2^18855914955 is an apocalyptic number.

18855914955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18855914955 is a deficient number, since it is larger than the sum of its proper divisors (11317351509).

18855914955 is a wasteful number, since it uses less digits than its factorization.

18855914955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158446.

The product of its digits is 12960000, while the sum is 60.

The spelling of 18855914955 in words is "eighteen billion, eight hundred fifty-five million, nine hundred fourteen thousand, nine hundred fifty-five".