18321085 has 8 divisors (see below), whose sum is σ = 22023936. Its totient is φ = 14631120.

The previous prime is 18321077. The next prime is 18321089. The reversal of 18321085 is 58012381.

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

It is not a de Polignac number, because 18321085 - 2³ = 18321077 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 (18321089) 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, 252 + ... + 6058.

It is an arithmetic number, because the mean of its divisors is an integer number (2752992).

Almost surely, 2^18321085 is an apocalyptic number.

It is an amenable number.

18321085 is a deficient number, since it is larger than the sum of its proper divisors (3702851).

18321085 is an equidigital number, since it uses as much as digits as its factorization.

18321085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6443.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 18321085 is about 4280.3136567312. The cubic root of 18321085 is about 263.6232621854.

The spelling of 18321085 in words is "eighteen million, three hundred twenty-one thousand, eighty-five".