18439324 has 12 divisors (see below), whose sum is σ = 32798248. Its totient is φ = 9068400.

The previous prime is 18439321. The next prime is 18439349. The reversal of 18439324 is 42393481.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18439324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18439321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37542 + ... + 38029.

Almost surely, 2^18439324 is an apocalyptic number.

It is an amenable number.

18439324 is a deficient number, since it is larger than the sum of its proper divisors (14358924).

18439324 is a wasteful number, since it uses less digits than its factorization.

18439324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75636 (or 75634 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 18439324 is about 4294.1033988482. The cubic root of 18439324 is about 264.1891627136.

The spelling of 18439324 in words is "eighteen million, four hundred thirty-nine thousand, three hundred twenty-four".