18012188 has 6 divisors (see below), whose sum is σ = 31521336. Its totient is φ = 9006092.

The previous prime is 18012179. The next prime is 18012191. The reversal of 18012188 is 88121081.

It is a self number, because there is not a number n which added to its sum of digits gives 18012188.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2251520 + ... + 2251527.

It is an arithmetic number, because the mean of its divisors is an integer number (5253556).

Almost surely, 2^18012188 is an apocalyptic number.

It is an amenable number.

18012188 is a deficient number, since it is larger than the sum of its proper divisors (13509148).

18012188 is a wasteful number, since it uses less digits than its factorization.

18012188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4503051 (or 4503049 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 29.

The square root of 18012188 is about 4244.0768136310. The cubic root of 18012188 is about 262.1332771792.

The spelling of 18012188 in words is "eighteen million, twelve thousand, one hundred eighty-eight".