18668327 has 2 divisors, whose sum is σ = 18668328. Its totient is φ = 18668326.

The previous prime is 18668323. The next prime is 18668333. The reversal of 18668327 is 72386681.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18668327 - 2² = 18668323 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18668323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9334163 + 9334164.

It is an arithmetic number, because the mean of its divisors is an integer number (9334164).

Almost surely, 2^18668327 is an apocalyptic number.

18668327 is a deficient number, since it is larger than the sum of its proper divisors (1).

18668327 is an equidigital number, since it uses as much as digits as its factorization.

18668327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 41.

The square root of 18668327 is about 4320.6859409126. The cubic root of 18668327 is about 265.2783452472.

The spelling of 18668327 in words is "eighteen million, six hundred sixty-eight thousand, three hundred twenty-seven".