18182369 has 2 divisors, whose sum is σ = 18182370. Its totient is φ = 18182368.

The previous prime is 18182309. The next prime is 18182377. The reversal of 18182369 is 96328181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9985600 + 8196769 = 3160^2 + 2863^2 .

It is a cyclic number.

It is not a de Polignac number, because 18182369 - 2⁸ = 18182113 is a prime.

It is a super-2 number, since 2×18182369² = 661197084904322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18182309) 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, 9091184 + 9091185.

It is an arithmetic number, because the mean of its divisors is an integer number (9091185).

Almost surely, 2^18182369 is an apocalyptic number.

It is an amenable number.

18182369 is a deficient number, since it is larger than the sum of its proper divisors (1).

18182369 is an equidigital number, since it uses as much as digits as its factorization.

18182369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 38.

The square root of 18182369 is about 4264.0789157801. The cubic root of 18182369 is about 262.9562447991.

The spelling of 18182369 in words is "eighteen million, one hundred eighty-two thousand, three hundred sixty-nine".