18307141 has 2 divisors, whose sum is σ = 18307142. Its totient is φ = 18307140.

The previous prime is 18307129. The next prime is 18307151. The reversal of 18307141 is 14170381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12285025 + 6022116 = 3505^2 + 2454^2 .

It is a cyclic number.

It is not a de Polignac number, because 18307141 - 2⁵ = 18307109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18307151) 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, 9153570 + 9153571.

It is an arithmetic number, because the mean of its divisors is an integer number (9153571).

Almost surely, 2^18307141 is an apocalyptic number.

It is an amenable number.

18307141 is a deficient number, since it is larger than the sum of its proper divisors (1).

18307141 is an equidigital number, since it uses as much as digits as its factorization.

18307141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 18307141 is about 4278.6844940939. The cubic root of 18307141 is about 263.5563648420.

The spelling of 18307141 in words is "eighteen million, three hundred seven thousand, one hundred forty-one".