18000093 has 16 divisors (see below), whose sum is σ = 26101440. Its totient is φ = 10987776.

The previous prime is 18000089. The next prime is 18000137. The reversal of 18000093 is 39000081.

It is not a de Polignac number, because 18000093 - 2² = 18000089 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18000893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2883 + ... + 6656.

It is an arithmetic number, because the mean of its divisors is an integer number (1631340).

Almost surely, 2^18000093 is an apocalyptic number.

It is an amenable number.

18000093 is a deficient number, since it is larger than the sum of its proper divisors (8101347).

18000093 is a wasteful number, since it uses less digits than its factorization.

18000093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9596.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 18000093 is about 4242.6516472602. The cubic root of 18000093 is about 262.0745907700.

The spelling of 18000093 in words is "eighteen million, ninety-three", and thus it is an aban number and an uban number.