18301109 has 2 divisors, whose sum is σ = 18301110. Its totient is φ = 18301108.

The previous prime is 18301069. The next prime is 18301111. The reversal of 18301109 is 90110381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12802084 + 5499025 = 3578^2 + 2345^2 .

It is a cyclic number.

It is not a de Polignac number, because 18301109 - 2⁸ = 18300853 is a prime.

It is a Sophie Germain prime.

Together with 18301111, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18301609) 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, 9150554 + 9150555.

It is an arithmetic number, because the mean of its divisors is an integer number (9150555).

Almost surely, 2^18301109 is an apocalyptic number.

It is an amenable number.

18301109 is a deficient number, since it is larger than the sum of its proper divisors (1).

18301109 is an equidigital number, since it uses as much as digits as its factorization.

18301109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 18301109 is about 4277.9795464682. The cubic root of 18301109 is about 263.5274153622.

The spelling of 18301109 in words is "eighteen million, three hundred one thousand, one hundred nine".