The total number of male Levites, 23,000, shows an increase of 1,000 on the number at Sinai Numbers 3:39. It is doubtless to be taken as a round number; and, as before, includes the male children from a month old and upward, as well as the male adults.
Related Commentaries of Numbers 26:62
Numbers 26:62
62 And those that were numbered of them were twenty and three thousand, all males from a month old and upward: for they were not numbered among the children of Israel, because there was no inheritance given them among the children of Israel.