18786252 has 12 divisors (see below), whose sum is σ = 43834616. Its totient is φ = 6262080.

The previous prime is 18786247. The next prime is 18786253. The reversal of 18786252 is 25268781.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 18786252.

It is not an unprimeable number, because it can be changed into a prime (18786253) 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, 782749 + ... + 782772.

Almost surely, 2^18786252 is an apocalyptic number.

18786252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18786252 is an abundant number, since it is smaller than the sum of its proper divisors (25048364).

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

18786252 is a wasteful number, since it uses less digits than its factorization.

18786252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565528 (or 1565526 counting only the distinct ones).

The product of its digits is 53760, while the sum is 39.

The square root of 18786252 is about 4334.3110179128. The cubic root of 18786252 is about 265.8357476177.

The spelling of 18786252 in words is "eighteen million, seven hundred eighty-six thousand, two hundred fifty-two".