18000789 has 16 divisors (see below), whose sum is σ = 25631232. Its totient is φ = 11209968.

The previous prime is 18000779. The next prime is 18000797. The reversal of 18000789 is 98700081.

It is not a de Polignac number, because 18000789 - 2⁵ = 18000757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18000709) 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, 67 + ... + 6000.

It is an arithmetic number, because the mean of its divisors is an integer number (1601952).

Almost surely, 2^18000789 is an apocalyptic number.

It is an amenable number.

18000789 is a deficient number, since it is larger than the sum of its proper divisors (7630443).

18000789 is a wasteful number, since it uses less digits than its factorization.

18000789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6136.

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 18000789 is about 4242.7336706421. The cubic root of 18000789 is about 262.0779685593.

The spelling of 18000789 in words is "eighteen million, seven hundred eighty-nine", and thus it is an aban number.