18836089 has 2 divisors, whose sum is σ = 18836090. Its totient is φ = 18836088.

The previous prime is 18836063. The next prime is 18836093. The reversal of 18836089 is 98063881.

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., 9715689 + 9120400 = 3117^2 + 3020^2 .

It is a cyclic number.

It is not a de Polignac number, because 18836089 - 2¹⁵ = 18803321 is a prime.

It is not a weakly prime, because it can be changed into another prime (18836009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9418044 + 9418045.

It is an arithmetic number, because the mean of its divisors is an integer number (9418045).

Almost surely, 2^18836089 is an apocalyptic number.

It is an amenable number.

18836089 is a deficient number, since it is larger than the sum of its proper divisors (1).

18836089 is an equidigital number, since it uses as much as digits as its factorization.

18836089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 18836089 is about 4340.0563360399. The cubic root of 18836089 is about 266.0706136610.

The spelling of 18836089 in words is "eighteen million, eight hundred thirty-six thousand, eighty-nine".