18318611 has 2 divisors, whose sum is σ = 18318612. Its totient is φ = 18318610.

The previous prime is 18318593. The next prime is 18318617. The reversal of 18318611 is 11681381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18318611 - 2²² = 14124307 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18318617) 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, 9159305 + 9159306.

It is an arithmetic number, because the mean of its divisors is an integer number (9159306).

Almost surely, 2^18318611 is an apocalyptic number.

18318611 is a deficient number, since it is larger than the sum of its proper divisors (1).

18318611 is an equidigital number, since it uses as much as digits as its factorization.

18318611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 29.

The square root of 18318611 is about 4280.0246494617. The cubic root of 18318611 is about 263.6113954699.

Adding to 18318611 its reverse (11681381), we get a palindrome (29999992).

The spelling of 18318611 in words is "eighteen million, three hundred eighteen thousand, six hundred eleven".