18045504 has 105 divisors (see below), whose sum is σ = 54414547. Its totient is φ = 5913216.

The previous prime is 18045491. The next prime is 18045541. The reversal of 18045504 is 40554081.

The square root of 18045504 is 4248.

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

It is a super-2 number, since 2×18045504² = 651280429228032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 305827 + ... + 305885.

Almost surely, 2^18045504 is an apocalyptic number.

18045504 is the 4248-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18045504

18045504 is an abundant number, since it is smaller than the sum of its proper divisors (36369043).

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

18045504 is an frugal number, since it uses more digits than its factorization.

18045504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The cubic root of 18045504 is about 262.2947947278.

Adding to 18045504 its reverse (40554081), we get a palindrome (58599585).

The spelling of 18045504 in words is "eighteen million, forty-five thousand, five hundred four".