18803479856 has 20 divisors (see below), whose sum is σ = 41636277072. Its totient is φ = 8058634176.

The previous prime is 18803479843. The next prime is 18803479861. The reversal of 18803479856 is 65897430881.

It is a happy number.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18803479795 and 18803479804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83943995 + ... + 83944218.

Almost surely, 2^18803479856 is an apocalyptic number.

18803479856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18803479856 is an abundant number, since it is smaller than the sum of its proper divisors (22832797216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18803479856 is a wasteful number, since it uses less digits than its factorization.

18803479856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167888228 (or 167888222 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 59.

The spelling of 18803479856 in words is "eighteen billion, eight hundred three million, four hundred seventy-nine thousand, eight hundred fifty-six".