18642269 has 2 divisors, whose sum is σ = 18642270. Its totient is φ = 18642268.

The previous prime is 18642227. The next prime is 18642311. The reversal of 18642269 is 96224681.

It is a balanced prime because it is at equal distance from previous prime (18642227) and next prime (18642311).

It can be written as a sum of positive squares in only one way, i.e., 17347225 + 1295044 = 4165^2 + 1138^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18642269 is a prime.

It is a super-2 number, since 2×18642269² = 695068386936722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18642469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9321134 + 9321135.

It is an arithmetic number, because the mean of its divisors is an integer number (9321135).

Almost surely, 2^18642269 is an apocalyptic number.

It is an amenable number.

18642269 is a deficient number, since it is larger than the sum of its proper divisors (1).

18642269 is an equidigital number, since it uses as much as digits as its factorization.

18642269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 38.

The square root of 18642269 is about 4317.6693944766. The cubic root of 18642269 is about 265.1548590537.

The spelling of 18642269 in words is "eighteen million, six hundred forty-two thousand, two hundred sixty-nine".