18774408448 has 72 divisors (see below), whose sum is σ = 38079720000. Its totient is φ = 9236398080.

The previous prime is 18774408431. The next prime is 18774408479. The reversal of 18774408448 is 84480447781.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15030928 + ... + 15032176.

It is an arithmetic number, because the mean of its divisors is an integer number (528885000).

Almost surely, 2^18774408448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18774408448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19039860000).

18774408448 is an abundant number, since it is smaller than the sum of its proper divisors (19305311552).

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

18774408448 is an equidigital number, since it uses as much as digits as its factorization.

18774408448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163 (or 2149 counting only the distinct ones).

The product of its (nonzero) digits is 6422528, while the sum is 55.

The spelling of 18774408448 in words is "eighteen billion, seven hundred seventy-four million, four hundred eight thousand, four hundred forty-eight".