18718244880 has 80 divisors (see below), whose sum is σ = 60027497280. Its totient is φ = 4819408384.

The previous prime is 18718244861. The next prime is 18718244921. The reversal of 18718244880 is 8844281781.

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 1337742 + ... + 1351661.

It is an arithmetic number, because the mean of its divisors is an integer number (750343716).

Almost surely, 2^18718244880 is an apocalyptic number.

18718244880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18718244880 is an abundant number, since it is smaller than the sum of its proper divisors (41309252400).

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

18718244880 is a wasteful number, since it uses less digits than its factorization.

18718244880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689448 (or 2689442 counting only the distinct ones).

The product of its (nonzero) digits is 917504, while the sum is 51.

The spelling of 18718244880 in words is "eighteen billion, seven hundred eighteen million, two hundred forty-four thousand, eight hundred eighty".