16818443 has 2 divisors, whose sum is σ = 16818444. Its totient is φ = 16818442.

The previous prime is 16818427. The next prime is 16818449. The reversal of 16818443 is 34481861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16818443 - 2⁴ = 16818427 is a prime.

It is not a weakly prime, because it can be changed into another prime (16818449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8409221 + 8409222.

It is an arithmetic number, because the mean of its divisors is an integer number (8409222).

Almost surely, 2^16818443 is an apocalyptic number.

16818443 is a deficient number, since it is larger than the sum of its proper divisors (1).

16818443 is an equidigital number, since it uses as much as digits as its factorization.

16818443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 35.

The square root of 16818443 is about 4101.0295048926. The cubic root of 16818443 is about 256.2095198400.

The spelling of 16818443 in words is "sixteen million, eight hundred eighteen thousand, four hundred forty-three".