18320885 has 8 divisors (see below), whose sum is σ = 23983776. Its totient is φ = 13324240.

The previous prime is 18320879. The next prime is 18320899. The reversal of 18320885 is 58802381.

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

It is not a de Polignac number, because 18320885 - 2⁶ = 18320821 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166499 + ... + 166608.

It is an arithmetic number, because the mean of its divisors is an integer number (2997972).

Almost surely, 2^18320885 is an apocalyptic number.

It is an amenable number.

18320885 is a deficient number, since it is larger than the sum of its proper divisors (5662891).

18320885 is a wasteful number, since it uses less digits than its factorization.

18320885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333123.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 18320885 is about 4280.2902938936. The cubic root of 18320885 is about 263.6223029110.

The spelling of 18320885 in words is "eighteen million, three hundred twenty thousand, eight hundred eighty-five".