We start by calculating the division of the two given values:
\[
N_{2}^{2} = \frac{2.1767 \times 10^{-18}}{5.4471 \times 10^{-19}} = 3.9960713039966222
\]
Step 2: Take the Square Root
Next, we take the square root of the result from Step 1 to find \( N_2 \):
\[
N_2 = \sqrt{3.9960713039966222}
\]
Step 3: Present the Final Result
After calculating the square root, we find:
\[
N_2 \approx 1.999017584714207
\]