18066073 has 2 divisors, whose sum is σ = 18066074. Its totient is φ = 18066072.

The previous prime is 18066071. The next prime is 18066077. The reversal of 18066073 is 37066081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9048064 + 9018009 = 3008^2 + 3003^2 .

It is a cyclic number.

It is not a de Polignac number, because 18066073 - 2¹ = 18066071 is a prime.

Together with 18066071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18066071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9033036 + 9033037.

It is an arithmetic number, because the mean of its divisors is an integer number (9033037).

Almost surely, 2^18066073 is an apocalyptic number.

It is an amenable number.

18066073 is a deficient number, since it is larger than the sum of its proper divisors (1).

18066073 is an equidigital number, since it uses as much as digits as its factorization.

18066073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 18066073 is about 4250.4203321554. The cubic root of 18066073 is about 262.3944149816.

The spelling of 18066073 in words is "eighteen million, sixty-six thousand, seventy-three".