18009323 has 2 divisors, whose sum is σ = 18009324. Its totient is φ = 18009322.

The previous prime is 18009289. The next prime is 18009401. The reversal of 18009323 is 32390081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18009323 - 2⁶ = 18009259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18009292 and 18009301.

It is not a weakly prime, because it can be changed into another prime (18009223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9004661 + 9004662.

It is an arithmetic number, because the mean of its divisors is an integer number (9004662).

Almost surely, 2^18009323 is an apocalyptic number.

18009323 is a deficient number, since it is larger than the sum of its proper divisors (1).

18009323 is an equidigital number, since it uses as much as digits as its factorization.

18009323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 18009323 is about 4243.7392709732. The cubic root of 18009323 is about 262.1193782262.

The spelling of 18009323 in words is "eighteen million, nine thousand, three hundred twenty-three".