18328344992 has 48 divisors (see below), whose sum is σ = 36741289032. Its totient is φ = 8997765120.

The previous prime is 18328344977. The next prime is 18328345001. The reversal of 18328344992 is 29944382381.

It can be written as a sum of positive squares in 4 ways, for example, as 18290939536 + 37405456 = 135244^2 + 6116^2 .

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, 1118168 + ... + 1134440.

Almost surely, 2^18328344992 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 18328344992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18370644516).

18328344992 is an abundant number, since it is smaller than the sum of its proper divisors (18412944040).

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

18328344992 is a wasteful number, since it uses less digits than its factorization.

18328344992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16921 (or 16913 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 53.

The spelling of 18328344992 in words is "eighteen billion, three hundred twenty-eight million, three hundred forty-four thousand, nine hundred ninety-two".