18282109 has 2 divisors, whose sum is σ = 18282110. Its totient is φ = 18282108.

The previous prime is 18282073. The next prime is 18282119. The reversal of 18282109 is 90128281.

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., 17724100 + 558009 = 4210^2 + 747^2 .

It is a cyclic number.

It is not a de Polignac number, because 18282109 - 2⁷ = 18281981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18282119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9141054 + 9141055.

It is an arithmetic number, because the mean of its divisors is an integer number (9141055).

Almost surely, 2^18282109 is an apocalyptic number.

It is an amenable number.

18282109 is a deficient number, since it is larger than the sum of its proper divisors (1).

18282109 is an equidigital number, since it uses as much as digits as its factorization.

18282109 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 18282109 is about 4275.7582953203. The cubic root of 18282109 is about 263.4361867443.

The spelling of 18282109 in words is "eighteen million, two hundred eighty-two thousand, one hundred nine".