18383009 has 2 divisors, whose sum is σ = 18383010. Its totient is φ = 18383008.

The previous prime is 18382993. The next prime is 18383033. The reversal of 18383009 is 90038381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10543009 + 7840000 = 3247^2 + 2800^2 .

It is an emirp because it is prime and its reverse (90038381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18383009 - 2⁴ = 18382993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18383609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9191504 + 9191505.

It is an arithmetic number, because the mean of its divisors is an integer number (9191505).

Almost surely, 2^18383009 is an apocalyptic number.

It is an amenable number.

18383009 is a deficient number, since it is larger than the sum of its proper divisors (1).

18383009 is an equidigital number, since it uses as much as digits as its factorization.

18383009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 18383009 is about 4287.5411368289. The cubic root of 18383009 is about 263.9199376521.

The spelling of 18383009 in words is "eighteen million, three hundred eighty-three thousand, nine".