18303131020 has 24 divisors (see below), whose sum is σ = 39010258224. Its totient is φ = 7211979456.

The previous prime is 18303130931. The next prime is 18303131057. The reversal of 18303131020 is 2013130381.

It is a junction number, because it is equal to n+sod(n) for n = 18303130982 and 18303131000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6828187 + ... + 6830866.

It is an arithmetic number, because the mean of its divisors is an integer number (1625427426).

Almost surely, 2^18303131020 is an apocalyptic number.

18303131020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18303131020 is an abundant number, since it is smaller than the sum of its proper divisors (20707127204).

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

18303131020 is a wasteful number, since it uses less digits than its factorization.

18303131020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13659129 (or 13659127 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 18303131020 in words is "eighteen billion, three hundred three million, one hundred thirty-one thousand, twenty".