18133244 has 12 divisors (see below), whose sum is σ = 31861368. Its totient is φ = 9030000.

The previous prime is 18133217. The next prime is 18133279. The reversal of 18133244 is 44233181.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 8027 + ... + 10034.

It is an arithmetic number, because the mean of its divisors is an integer number (2655114).

Almost surely, 2^18133244 is an apocalyptic number.

It is an amenable number.

18133244 is a deficient number, since it is larger than the sum of its proper divisors (13728124).

18133244 is a wasteful number, since it uses less digits than its factorization.

18133244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18316 (or 18314 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 18133244 is about 4258.3146901092. The cubic root of 18133244 is about 262.7192134073.

The spelling of 18133244 in words is "eighteen million, one hundred thirty-three thousand, two hundred forty-four".