18214943 has 2 divisors, whose sum is σ = 18214944. Its totient is φ = 18214942.

The previous prime is 18214921. The next prime is 18214957. The reversal of 18214943 is 34941281.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (34941281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18214943 - 2⁶ = 18214879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18214043) 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, 9107471 + 9107472.

It is an arithmetic number, because the mean of its divisors is an integer number (9107472).

Almost surely, 2^18214943 is an apocalyptic number.

18214943 is a deficient number, since it is larger than the sum of its proper divisors (1).

18214943 is an equidigital number, since it uses as much as digits as its factorization.

18214943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 32.

The square root of 18214943 is about 4267.8967888176. The cubic root of 18214943 is about 263.1131812010.

The spelling of 18214943 in words is "eighteen million, two hundred fourteen thousand, nine hundred forty-three".