18326249 has 2 divisors, whose sum is σ = 18326250. Its totient is φ = 18326248.

The previous prime is 18326197. The next prime is 18326251. The reversal of 18326249 is 94262381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9517225 + 8809024 = 3085^2 + 2968^2 .

It is an emirp because it is prime and its reverse (94262381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18326249 - 2¹⁶ = 18260713 is a prime.

Together with 18326251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18320249) 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, 9163124 + 9163125.

It is an arithmetic number, because the mean of its divisors is an integer number (9163125).

Almost surely, 2^18326249 is an apocalyptic number.

It is an amenable number.

18326249 is a deficient number, since it is larger than the sum of its proper divisors (1).

18326249 is an equidigital number, since it uses as much as digits as its factorization.

18326249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 18326249 is about 4280.9168410517. The cubic root of 18326249 is about 263.6480282339.

The spelling of 18326249 in words is "eighteen million, three hundred twenty-six thousand, two hundred forty-nine".