18744403824 has 120 divisors (see below), whose sum is σ = 53752004592. Its totient is φ = 6094448640.

The previous prime is 18744403757. The next prime is 18744403877. The reversal of 18744403824 is 42830444781.

18744403824 is a `hidden beast` number, since 187 + 4 + 440 + 3 + 8 + 24 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 18744403824.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5825064 + ... + 5828280.

Almost surely, 2^18744403824 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 18744403824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26876002296).

18744403824 is an abundant number, since it is smaller than the sum of its proper divisors (35007600768).

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

18744403824 is a wasteful number, since it uses less digits than its factorization.

18744403824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4215 (or 4206 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 45.

The spelling of 18744403824 in words is "eighteen billion, seven hundred forty-four million, four hundred three thousand, eight hundred twenty-four".