18422311 has 2 divisors, whose sum is σ = 18422312. Its totient is φ = 18422310.

The previous prime is 18422303. The next prime is 18422321. The reversal of 18422311 is 11322481.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18422311 - 2³ = 18422303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18422321) 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, 9211155 + 9211156.

It is an arithmetic number, because the mean of its divisors is an integer number (9211156).

Almost surely, 2^18422311 is an apocalyptic number.

18422311 is a deficient number, since it is larger than the sum of its proper divisors (1).

18422311 is an equidigital number, since it uses as much as digits as its factorization.

18422311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 22.

The square root of 18422311 is about 4292.1219693760. The cubic root of 18422311 is about 264.1078865370.

Adding to 18422311 its reverse (11322481), we get a palindrome (29744792).

The spelling of 18422311 in words is "eighteen million, four hundred twenty-two thousand, three hundred eleven".