18024516 has 54 divisors (see below), whose sum is σ = 47169486. Its totient is φ = 5803200.

The previous prime is 18024499. The next prime is 18024527. The reversal of 18024516 is 61542081.

It can be written as a sum of positive squares in only one way, i.e., 13838400 + 4186116 = 3720^2 + 2046^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18024516.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 34336 + ... + 34856.

It is an arithmetic number, because the mean of its divisors is an integer number (873509).

Almost surely, 2^18024516 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 18024516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23584743).

18024516 is an abundant number, since it is smaller than the sum of its proper divisors (29144970).

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

18024516 is a wasteful number, since it uses less digits than its factorization.

18024516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593 (or 557 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 18024516 is about 4245.5289423110. The cubic root of 18024516 is about 262.1930671033.

Adding to 18024516 its reverse (61542081), we get a palindrome (79566597).

The spelling of 18024516 in words is "eighteen million, twenty-four thousand, five hundred sixteen".