18000075 has 24 divisors (see below), whose sum is σ = 30051648. Its totient is φ = 9506080.

The previous prime is 18000067. The next prime is 18000089. The reversal of 18000075 is 57000081.

It is a happy number.

It is not a de Polignac number, because 18000075 - 2³ = 18000067 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 6904 + ... + 9146.

It is an arithmetic number, because the mean of its divisors is an integer number (1252152).

Almost surely, 2^18000075 is an apocalyptic number.

18000075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18000075 is a deficient number, since it is larger than the sum of its proper divisors (12051573).

18000075 is a wasteful number, since it uses less digits than its factorization.

18000075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2363 (or 2358 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 18000075 is about 4242.6495259448. The cubic root of 18000075 is about 262.0745034122.

The spelling of 18000075 in words is "eighteen million, seventy-five", and thus it is an aban number and an uban number.