18000459 has 12 divisors (see below), whose sum is σ = 26315016. Its totient is φ = 11855232.

The previous prime is 18000457. The next prime is 18000469. The reversal of 18000459 is 95400081.

It is not a de Polignac number, because 18000459 - 2¹ = 18000457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18000457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11302 + ... + 12795.

It is an arithmetic number, because the mean of its divisors is an integer number (2192918).

Almost surely, 2^18000459 is an apocalyptic number.

18000459 is a deficient number, since it is larger than the sum of its proper divisors (8314557).

18000459 is a wasteful number, since it uses less digits than its factorization.

18000459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24186 (or 24183 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 18000459 is about 4242.6947804432. The cubic root of 18000459 is about 262.0763670321.

The spelling of 18000459 in words is "eighteen million, four hundred fifty-nine", and thus it is an aban number.