18269 has 2 divisors, whose sum is σ = 18270. Its totient is φ = 18268.

The previous prime is 18257. The next prime is 18287. The reversal of 18269 is 96281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16900 + 1369 = 130^2 + 37^2 .

It is an emirp because it is prime and its reverse (96281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18269 - 2⁴ = 18253 is a prime.

It is a super-2 number, since 2×18269² = 667512722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9134 + 9135.

It is an arithmetic number, because the mean of its divisors is an integer number (9135).

2¹⁸²⁶⁹ is an apocalyptic number.

It is an amenable number.

18269 is a deficient number, since it is larger than the sum of its proper divisors (1).

18269 is an equidigital number, since it uses as much as digits as its factorization.

18269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 26.

The square root of 18269 is about 135.1628647225. The cubic root of 18269 is about 26.3373206944.

The spelling of 18269 in words is "eighteen thousand, two hundred sixty-nine".