Converting number to words in Crystal Reports

You want to use the ToWords() and ProperCase() functions.

//{@Convert}
// returns Ten Thousand
ProperCase( ToWords(10000, 0) )

//{@Convert}
// returns Ten Thousand
ProperCase( ToWords(20,25000, 0) )

This show two hundred and twenty five thousand only.

If you need in proper Indian formats like **Four lakhs Twenty Three Thousand...**etc, then follow the link https://archive.sap.com/discussions/thread/2030967. Refer comment by Balakumar Viswanathan. It worked for me.