18072524 has 12 divisors (see below), whose sum is σ = 31656744. Its totient is φ = 9027744.

The previous prime is 18072499. The next prime is 18072557. The reversal of 18072524 is 42527081.

It is a super-3 number, since 3×18072524³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6839 + ... + 9105.

It is an arithmetic number, because the mean of its divisors is an integer number (2638062).

Almost surely, 2^18072524 is an apocalyptic number.

It is an amenable number.

18072524 is a deficient number, since it is larger than the sum of its proper divisors (13584220).

18072524 is a wasteful number, since it uses less digits than its factorization.

18072524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4264 (or 4262 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 18072524 is about 4251.1791305472. The cubic root of 18072524 is about 262.4256430360.

The spelling of 18072524 in words is "eighteen million, seventy-two thousand, five hundred twenty-four".