18340169 has 2 divisors, whose sum is σ = 18340170. Its totient is φ = 18340168.

The previous prime is 18340163. The next prime is 18340207. The reversal of 18340169 is 96104381.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16810000 + 1530169 = 4100^2 + 1237^2 .

It is a cyclic number.

It is not a de Polignac number, because 18340169 - 2⁸ = 18339913 is a prime.

It is a super-2 number, since 2×18340169² = 672723597897122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18340163) 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, 9170084 + 9170085.

It is an arithmetic number, because the mean of its divisors is an integer number (9170085).

Almost surely, 2^18340169 is an apocalyptic number.

It is an amenable number.

18340169 is a deficient number, since it is larger than the sum of its proper divisors (1).

18340169 is an equidigital number, since it uses as much as digits as its factorization.

18340169 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 18340169 is about 4282.5423523884. The cubic root of 18340169 is about 263.7147640536.

The spelling of 18340169 in words is "eighteen million, three hundred forty thousand, one hundred sixty-nine".