18836369 has 2 divisors, whose sum is σ = 18836370. Its totient is φ = 18836368.

The previous prime is 18836339. The next prime is 18836383. The reversal of 18836369 is 96363881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10163344 + 8673025 = 3188^2 + 2945^2 .

It is a cyclic number.

It is not a de Polignac number, because 18836369 - 2⁸ = 18836113 is a prime.

It is a super-2 number, since 2×18836369² = 709617594208322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18836329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9418184 + 9418185.

It is an arithmetic number, because the mean of its divisors is an integer number (9418185).

Almost surely, 2^18836369 is an apocalyptic number.

It is an amenable number.

18836369 is a deficient number, since it is larger than the sum of its proper divisors (1).

18836369 is an equidigital number, since it uses as much as digits as its factorization.

18836369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 44.

The square root of 18836369 is about 4340.0885935658. The cubic root of 18836369 is about 266.0719320416.

The spelling of 18836369 in words is "eighteen million, eight hundred thirty-six thousand, three hundred sixty-nine".