18885536736 has 72 divisors (see below), whose sum is σ = 54491050152. Its totient is φ = 5722886400.

The previous prime is 18885536717. The next prime is 18885536749. The reversal of 18885536736 is 63763558881.

It is a self number, because there is not a number n which added to its sum of digits gives 18885536736.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 801295 + ... + 824526.

It is an arithmetic number, because the mean of its divisors is an integer number (756820141).

Almost surely, 2^18885536736 is an apocalyptic number.

18885536736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18885536736 is an abundant number, since it is smaller than the sum of its proper divisors (35605513416).

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

18885536736 is a wasteful number, since it uses less digits than its factorization.

18885536736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625856 (or 1625837 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 60.

The spelling of 18885536736 in words is "eighteen billion, eight hundred eighty-five million, five hundred thirty-six thousand, seven hundred thirty-six".