18027169 has 2 divisors, whose sum is σ = 18027170. Its totient is φ = 18027168.

The previous prime is 18027059. The next prime is 18027173. The reversal of 18027169 is 96172081.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17740944 + 286225 = 4212^2 + 535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18027169 is a prime.

It is a super-2 number, since 2×18027169² = 649957644309122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18027199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9013584 + 9013585.

It is an arithmetic number, because the mean of its divisors is an integer number (9013585).

Almost surely, 2^18027169 is an apocalyptic number.

It is an amenable number.

18027169 is a deficient number, since it is larger than the sum of its proper divisors (1).

18027169 is an equidigital number, since it uses as much as digits as its factorization.

18027169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 18027169 is about 4245.8413771595. The cubic root of 18027169 is about 262.2059303999.

The spelling of 18027169 in words is "eighteen million, twenty-seven thousand, one hundred sixty-nine".