14. (14 points) On the blackboard, several consecutive natural numbers starting from 11 were written (such as $11,12,13 \cdots$), and then one of the numbers was erased. The average of the remaining numbers is 23. What is the natural number that was erased?
14. (14 points) On the blackboard, several consecutive natural numbers starting from 11 (such as $11,12,13 \cdots$) were written. Later, one of the numbers was erased, and the average of the remaining numbers is 23. What is the natural number that was erased?
【Solution】From the above analysis, we get
$$
\begin{aligned}
& (11+12+\cdots+37)-\frac{618}{26} \times 26, \\
= & 648-618 \\
= & 30 .
\end{aligned}
$$

Answer: The natural number that was erased is 30.