Question 17
The two-digit integers from $19$ to $92$ are written consecutively to form the large integer $$
N=19202122\ldots909192.
$$ If $3^k$ is the highest power of $3$ that is a factor of $N,$ then $k=$
N=19202122\ldots909192.
$$ If $3^k$ is the highest power of $3$ that is a factor of $N,$ then $k=$