18855914956 has 24 divisors (see below), whose sum is σ = 36143694720. Its totient is φ = 8567392512.

The previous prime is 18855914929. The next prime is 18855914969. The reversal of 18855914956 is 65941955881.

It is a junction number, because it is equal to n+sod(n) for n = 18855914894 and 18855914903.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4778940 + ... + 4782883.

It is an arithmetic number, because the mean of its divisors is an integer number (1505987280).

Almost surely, 2^18855914956 is an apocalyptic number.

It is an amenable number.

18855914956 is a deficient number, since it is larger than the sum of its proper divisors (17287779764).

18855914956 is a wasteful number, since it uses less digits than its factorization.

18855914956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9561873 (or 9561871 counting only the distinct ones).

The product of its digits is 15552000, while the sum is 61.

The spelling of 18855914956 in words is "eighteen billion, eight hundred fifty-five million, nine hundred fourteen thousand, nine hundred fifty-six".