18009133 has 2 divisors, whose sum is σ = 18009134. Its totient is φ = 18009132.

The previous prime is 18009119. The next prime is 18009143. The reversal of 18009133 is 33190081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18003049 + 6084 = 4243^2 + 78^2 .

It is a cyclic number.

It is not a de Polignac number, because 18009133 - 2⁹ = 18008621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18009098 and 18009107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18009143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9004566 + 9004567.

It is an arithmetic number, because the mean of its divisors is an integer number (9004567).

Almost surely, 2^18009133 is an apocalyptic number.

It is an amenable number.

18009133 is a deficient number, since it is larger than the sum of its proper divisors (1).

18009133 is an equidigital number, since it uses as much as digits as its factorization.

18009133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 18009133 is about 4243.7168849960. The cubic root of 18009133 is about 262.1184564286.

The spelling of 18009133 in words is "eighteen million, nine thousand, one hundred thirty-three".