18046321 has 8 divisors (see below), whose sum is σ = 18322304. Its totient is φ = 17772480.

The previous prime is 18046297. The next prime is 18046331. The reversal of 18046321 is 12364081.

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 18046321 - 2⁹ = 18045809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18046331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24460 + ... + 25186.

It is an arithmetic number, because the mean of its divisors is an integer number (2290288).

Almost surely, 2^18046321 is an apocalyptic number.

It is an amenable number.

18046321 is a deficient number, since it is larger than the sum of its proper divisors (275983).

18046321 is a wasteful number, since it uses less digits than its factorization.

18046321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 18046321 is about 4248.0961618118. The cubic root of 18046321 is about 262.2987530843.

The spelling of 18046321 in words is "eighteen million, forty-six thousand, three hundred twenty-one".