You can get this code yourself really easily by using the Macro Recorder.
Just turn on the Macro Recorder, select column AV, go to Text to Columns from the Data menu, and click Finish.
Then stop the Macro Recorder and view the code that you just recorded.
The Macro Recorder is a great tool to get snippets of code like this, without ever having to write any VBA code yourself.
Text to Columns sort of "re-imports" the data. So values that look like numbers will come in as numbers.
So it will quickly converts numbers entered as text to numbers (assuming we are talking about hard-coded values and not formulas here).
Try it an see for yourself.