The total number of all the ⌞Levite⌟ males at least one month old was 23,000. They were not counted along with the other Israelites, because they were given no land of their own.
All their work, whatever they carry and all their duties, will be done under the direction of Aaron and his sons. You are in charge of telling them everything they’re supposed to carry.
Moses did not give any land as an inheritance to the tribe of Levi. The sacrifices offered to the Lord God of Israel are what the Levites inherited, as the Lord had promised them.