18019824 has 20 divisors (see below), whose sum is σ = 46551336. Its totient is φ = 6006592.

The previous prime is 18019823. The next prime is 18019849. The reversal of 18019824 is 42891081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18019823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187659 + ... + 187754.

Almost surely, 2^18019824 is an apocalyptic number.

It is an amenable number.

18019824 is an abundant number, since it is smaller than the sum of its proper divisors (28531512).

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

18019824 is a wasteful number, since it uses less digits than its factorization.

18019824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375424 (or 375418 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 18019824 is about 4244.9763250223. The cubic root of 18019824 is about 262.1703144511.

The spelling of 18019824 in words is "eighteen million, nineteen thousand, eight hundred twenty-four".