\(\mathrm{N}:=\) number of seconds since the birth of our universe.
Age of the universe (14 billion years) in seconds:
\[
\begin{aligned}
N &=14 * 10^{9} \text { years } * \frac{365 \text { days }}{\text { year }} * \frac{24 \text { hours }}{\text { day }} * \frac{3600 \text { seconds }}{\text { hour }} \\
&=441,504,000 * 10^{9} \approx 4.4 * 10^{17} \text { seconds. }
\end{aligned}
\]