18133924 has 12 divisors (see below), whose sum is σ = 31872204. Its totient is φ = 9027584.

The previous prime is 18133919. The next prime is 18133933. The reversal of 18133924 is 42933181.

It can be written as a sum of positive squares in 2 ways, for example, as 9241600 + 8892324 = 3040^2 + 2982^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8797 + ... + 10660.

It is an arithmetic number, because the mean of its divisors is an integer number (2656017).

Almost surely, 2^18133924 is an apocalyptic number.

It is an amenable number.

18133924 is a deficient number, since it is larger than the sum of its proper divisors (13738280).

18133924 is a wasteful number, since it uses less digits than its factorization.

18133924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19694 (or 19692 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 18133924 is about 4258.3945331545. The cubic root of 18133924 is about 262.7224973726.

The spelling of 18133924 in words is "eighteen million, one hundred thirty-three thousand, nine hundred twenty-four".