18524416 has 27 divisors (see below), whose sum is σ = 37114441. Its totient is φ = 9227776.

The previous prime is 18524369. The next prime is 18524423. The reversal of 18524416 is 61442581.

The square root of 18524416 is 4304.

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

It can be written as a sum of positive squares in only one way, i.e., 1218816 + 17305600 = 1104^2 + 4160^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 68730 + ... + 68998.

Almost surely, 2^18524416 is an apocalyptic number.

18524416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

18524416 is the 4304-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18524416

18524416 is an abundant number, since it is smaller than the sum of its proper divisors (18590025).

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

18524416 is an frugal number, since it uses more digits than its factorization.

18524416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554 (or 271 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

The cubic root of 18524416 is about 264.5949240188.

Adding to 18524416 its reverse (61442581), we get a palindrome (79966997).

The spelling of 18524416 in words is "eighteen million, five hundred twenty-four thousand, four hundred sixteen".