18418571 has 2 divisors, whose sum is σ = 18418572. Its totient is φ = 18418570.

The previous prime is 18418559. The next prime is 18418573. The reversal of 18418571 is 17581481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18418571 - 2¹⁴ = 18402187 is a prime.

Together with 18418573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18418573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9209285 + 9209286.

It is an arithmetic number, because the mean of its divisors is an integer number (9209286).

Almost surely, 2^18418571 is an apocalyptic number.

18418571 is a deficient number, since it is larger than the sum of its proper divisors (1).

18418571 is an equidigital number, since it uses as much as digits as its factorization.

18418571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8960, while the sum is 35.

The square root of 18418571 is about 4291.6862653274. The cubic root of 18418571 is about 264.0900127327.

The spelling of 18418571 in words is "eighteen million, four hundred eighteen thousand, five hundred seventy-one".