18687252 has 24 divisors (see below), whose sum is σ = 45108000. Its totient is φ = 6014176.

The previous prime is 18687169. The next prime is 18687269. The reversal of 18687252 is 25278681.

It is a self number, because there is not a number n which added to its sum of digits gives 18687252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26502 + ... + 27197.

It is an arithmetic number, because the mean of its divisors is an integer number (1879500).

Almost surely, 2^18687252 is an apocalyptic number.

18687252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18687252 is an abundant number, since it is smaller than the sum of its proper divisors (26420748).

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

18687252 is a wasteful number, since it uses less digits than its factorization.

18687252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53735 (or 53733 counting only the distinct ones).

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

The square root of 18687252 is about 4322.8754319319. The cubic root of 18687252 is about 265.3679568688.

The spelling of 18687252 in words is "eighteen million, six hundred eighty-seven thousand, two hundred fifty-two".