'Twenty' in the Bible

Or what king, going on his way to engage in war with another king, does not, sitting down first, take counsel whether he is able with ten thousand to meet him coming against him with twenty thousand?

And in those days Peter, standing up in the midst of the brethren, said, (the crowd of names who were together was about a hundred and twenty,)

and having sounded found twenty fathoms, and having gone a little farther and having again sounded they found fifteen fathoms;

Neither let us commit fornication, as some of them committed fornication, and fell in one day three and twenty thousand.