18305089 has 8 divisors (see below), whose sum is σ = 20000160. Its totient is φ = 16615200.

The previous prime is 18305071. The next prime is 18305117. The reversal of 18305089 is 98050381.

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

It is a cyclic number.

It is not a de Polignac number, because 18305089 - 2⁹ = 18304577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18305009) 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, 13534 + ... + 14824.

It is an arithmetic number, because the mean of its divisors is an integer number (2500020).

Almost surely, 2^18305089 is an apocalyptic number.

It is an amenable number.

18305089 is a deficient number, since it is larger than the sum of its proper divisors (1695071).

18305089 is a wasteful number, since it uses less digits than its factorization.

18305089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2591.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 18305089 is about 4278.4446940448. Note that the first 3 decimals coincide. The cubic root of 18305089 is about 263.5465173574.

The spelling of 18305089 in words is "eighteen million, three hundred five thousand, eighty-nine".