18065081 has 2 divisors, whose sum is σ = 18065082. Its totient is φ = 18065080.

The previous prime is 18065077. The next prime is 18065083. The reversal of 18065081 is 18056081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12816400 + 5248681 = 3580^2 + 2291^2 .

It is a cyclic number.

It is not a de Polignac number, because 18065081 - 2² = 18065077 is a prime.

It is a super-2 number, since 2×18065081² = 652694303073122, which contains 22 as substring.

Together with 18065083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18065083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9032540 + 9032541.

It is an arithmetic number, because the mean of its divisors is an integer number (9032541).

Almost surely, 2^18065081 is an apocalyptic number.

It is an amenable number.

18065081 is a deficient number, since it is larger than the sum of its proper divisors (1).

18065081 is an equidigital number, since it uses as much as digits as its factorization.

18065081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 18065081 is about 4250.3036362124. The cubic root of 18065081 is about 262.3896122403.

The spelling of 18065081 in words is "eighteen million, sixty-five thousand, eighty-one".