18218327 has 2 divisors, whose sum is σ = 18218328. Its totient is φ = 18218326.

The previous prime is 18218311. The next prime is 18218329. The reversal of 18218327 is 72381281.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18218327 - 2⁴ = 18218311 is a prime.

Together with 18218329, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18218293 and 18218302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18218329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9109163 + 9109164.

It is an arithmetic number, because the mean of its divisors is an integer number (9109164).

Almost surely, 2^18218327 is an apocalyptic number.

18218327 is a deficient number, since it is larger than the sum of its proper divisors (1).

18218327 is an equidigital number, since it uses as much as digits as its factorization.

18218327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 32.

The square root of 18218327 is about 4268.2932186062. The cubic root of 18218327 is about 263.1294740486.

The spelling of 18218327 in words is "eighteen million, two hundred eighteen thousand, three hundred twenty-seven".