18066943 has 2 divisors, whose sum is σ = 18066944. Its totient is φ = 18066942.

The previous prime is 18066899. The next prime is 18066947. The reversal of 18066943 is 34966081.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18066943 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18066947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9033471 + 9033472.

It is an arithmetic number, because the mean of its divisors is an integer number (9033472).

Almost surely, 2^18066943 is an apocalyptic number.

18066943 is a deficient number, since it is larger than the sum of its proper divisors (1).

18066943 is an equidigital number, since it uses as much as digits as its factorization.

18066943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 18066943 is about 4250.5226737426. The cubic root of 18066943 is about 262.3986269184.

The spelling of 18066943 in words is "eighteen million, sixty-six thousand, nine hundred forty-three".