18668323 has 2 divisors, whose sum is σ = 18668324. Its totient is φ = 18668322.

The previous prime is 18668303. The next prime is 18668327. The reversal of 18668323 is 32386681.

It is a strong prime.

It is an emirp because it is prime and its reverse (32386681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18668323 - 2⁵ = 18668291 is a prime.

It is not a weakly prime, because it can be changed into another prime (18668327) 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 as a sum of consecutive naturals, namely, 9334161 + 9334162.

It is an arithmetic number, because the mean of its divisors is an integer number (9334162).

Almost surely, 2^18668323 is an apocalyptic number.

18668323 is a deficient number, since it is larger than the sum of its proper divisors (1).

18668323 is an equidigital number, since it uses as much as digits as its factorization.

18668323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 37.

The square root of 18668323 is about 4320.6854780231. The cubic root of 18668323 is about 265.2783263004.

The spelling of 18668323 in words is "eighteen million, six hundred sixty-eight thousand, three hundred twenty-three".