18006789 has 8 divisors (see below), whose sum is σ = 24256960. Its totient is φ = 11880576.

The previous prime is 18006763. The next prime is 18006839. The reversal of 18006789 is 98760081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18006789 - 2⁹ = 18006277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18006739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30649 + ... + 31230.

It is an arithmetic number, because the mean of its divisors is an integer number (3032120).

Almost surely, 2^18006789 is an apocalyptic number.

It is an amenable number.

18006789 is a deficient number, since it is larger than the sum of its proper divisors (6250171).

18006789 is an equidigital number, since it uses as much as digits as its factorization.

18006789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61979.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 18006789 is about 4243.4407030145. The cubic root of 18006789 is about 262.1070838226.

The spelling of 18006789 in words is "eighteen million, six thousand, seven hundred eighty-nine".