18336409744 has 45 divisors (see below), whose sum is σ = 35999976267. Its totient is φ = 9047688192.

The previous prime is 18336409709. The next prime is 18336409747. The reversal of 18336409744 is 44790463381.

The square root of 18336409744 is 135412.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 670810000 + 17665599744 = 25900^2 + 132912^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18336409747) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 52539682 + ... + 52540030.

Almost surely, 2^18336409744 is an apocalyptic number.

18336409744 is the 135412-nd square number.

It is an amenable number.

18336409744 is a deficient number, since it is larger than the sum of its proper divisors (17663566523).

18336409744 is an frugal number, since it uses more digits than its factorization.

18336409744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 49.

Multiplying 18336409744 by its sum of digits (49), we get a square (898484077456 = 947884²).

The spelling of 18336409744 in words is "eighteen billion, three hundred thirty-six million, four hundred nine thousand, seven hundred forty-four".