14. Mr. Huang's home phone number is an eight-digit number. The sum of the number formed by the first four digits and the number formed by the last four digits is 14405. The sum of the number formed by the first three digits and the number formed by the last five digits is 16970. Mr. Huang's home phone number is
14. 82616144 .

Let the phone number be $100000 x+10000 y+z$, where $x$, $y$, and $z$ are all natural numbers, and $100 \leqslant x \leqslant 999, 0 \leqslant y \leqslant 9, 1000 \leqslant z \leqslant 9999$. Then
$$
\left\{\begin{array}{l}
10 x+y+z=14405, \\
x+10000 y+z=16970
\end{array} \Rightarrow 1111 y-x=285 .\right.
$$

From $100 \leqslant x \leqslant 999, y \geqslant 0$,
we get $y=1, x=826, z=6144$.