18664252 has 12 divisors (see below), whose sum is σ = 32722200. Its totient is φ = 9315056.

The previous prime is 18664229. The next prime is 18664253. The reversal of 18664252 is 25246681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18664253) 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, 1627 + ... + 6322.

It is an arithmetic number, because the mean of its divisors is an integer number (2726850).

Almost surely, 2^18664252 is an apocalyptic number.

It is an amenable number.

18664252 is a deficient number, since it is larger than the sum of its proper divisors (14057948).

18664252 is a wasteful number, since it uses less digits than its factorization.

18664252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8540 (or 8538 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 18664252 is about 4320.2143465342. The cubic root of 18664252 is about 265.2590418227.

The spelling of 18664252 in words is "eighteen million, six hundred sixty-four thousand, two hundred fifty-two".