18090833 has 2 divisors, whose sum is σ = 18090834. Its totient is φ = 18090832.

The previous prime is 18090829. The next prime is 18090841. The reversal of 18090833 is 33809081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18037009 + 53824 = 4247^2 + 232^2 .

It is a cyclic number.

It is not a de Polignac number, because 18090833 - 2² = 18090829 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18090833.

It is not a weakly prime, because it can be changed into another prime (18090883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9045416 + 9045417.

It is an arithmetic number, because the mean of its divisors is an integer number (9045417).

Almost surely, 2^18090833 is an apocalyptic number.

It is an amenable number.

18090833 is a deficient number, since it is larger than the sum of its proper divisors (1).

18090833 is an equidigital number, since it uses as much as digits as its factorization.

18090833 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 18090833 is about 4253.3319879831. The cubic root of 18090833 is about 262.5142329395.

The spelling of 18090833 in words is "eighteen million, ninety thousand, eight hundred thirty-three".