18330213 has 8 divisors (see below), whose sum is σ = 26662176. Its totient is φ = 11109200.

The previous prime is 18330211. The next prime is 18330229. The reversal of 18330213 is 31203381.

It is a happy number.

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 18330213 - 2¹ = 18330211 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18330213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18330211) 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, 277698 + ... + 277763.

It is an arithmetic number, because the mean of its divisors is an integer number (3332772).

Almost surely, 2^18330213 is an apocalyptic number.

It is an amenable number.

18330213 is a deficient number, since it is larger than the sum of its proper divisors (8331963).

18330213 is a wasteful number, since it uses less digits than its factorization.

18330213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555475.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 18330213 is about 4281.3798009520. The cubic root of 18330213 is about 263.6670360415.

Adding to 18330213 its reverse (31203381), we get a palindrome (49533594).

It can be divided in two parts, 183302 and 13, that added together give a triangular number (183315 = T₆₀₅).

The spelling of 18330213 in words is "eighteen million, three hundred thirty thousand, two hundred thirteen".