18955315456 has 72 divisors (see below), whose sum is σ = 47172936384. Its totient is φ = 7385180160.

The previous prime is 18955315441. The next prime is 18955315549. The reversal of 18955315456 is 65451355981.

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 7 ways as a sum of consecutive naturals, for example, 461095 + ... + 500518.

It is an arithmetic number, because the mean of its divisors is an integer number (655179672).

Almost surely, 2^18955315456 is an apocalyptic number.

18955315456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18955315456 is an abundant number, since it is smaller than the sum of its proper divisors (28217620928).

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

18955315456 is an equidigital number, since it uses as much as digits as its factorization.

18955315456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961647 (or 961633 counting only the distinct ones).

The product of its digits is 3240000, while the sum is 52.

The spelling of 18955315456 in words is "eighteen billion, nine hundred fifty-five million, three hundred fifteen thousand, four hundred fifty-six".