18422329 has 2 divisors, whose sum is σ = 18422330. Its totient is φ = 18422328.

The previous prime is 18422321. The next prime is 18422347. The reversal of 18422329 is 92322481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18292729 + 129600 = 4277^2 + 360^2 .

It is a cyclic number.

It is not a de Polignac number, because 18422329 - 2³ = 18422321 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18422329.

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, 9211164 + 9211165.

It is an arithmetic number, because the mean of its divisors is an integer number (9211165).

Almost surely, 2^18422329 is an apocalyptic number.

It is an amenable number.

18422329 is a deficient number, since it is larger than the sum of its proper divisors (1).

18422329 is an equidigital number, since it uses as much as digits as its factorization.

18422329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 31.

The square root of 18422329 is about 4292.1240662404. The cubic root of 18422329 is about 264.1079725548.

The spelling of 18422329 in words is "eighteen million, four hundred twenty-two thousand, three hundred twenty-nine".