18104089 has 2 divisors, whose sum is σ = 18104090. Its totient is φ = 18104088.

The previous prime is 18104087. The next prime is 18104101. The reversal of 18104089 is 98040181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13630864 + 4473225 = 3692^2 + 2115^2 .

It is a cyclic number.

It is not a de Polignac number, because 18104089 - 2¹ = 18104087 is a prime.

Together with 18104087, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18104089.

It is not a weakly prime, because it can be changed into another prime (18104087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9052044 + 9052045.

It is an arithmetic number, because the mean of its divisors is an integer number (9052045).

Almost surely, 2^18104089 is an apocalyptic number.

It is an amenable number.

18104089 is a deficient number, since it is larger than the sum of its proper divisors (1).

18104089 is an equidigital number, since it uses as much as digits as its factorization.

18104089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 18104089 is about 4254.8900103293. The cubic root of 18104089 is about 262.5783361064.

The spelling of 18104089 in words is "eighteen million, one hundred four thousand, eighty-nine".