What age would I prefer to be?

A nice simple puzzle. I'd really much prefer if the digits of my age were reversed. And halving my age after my next birthday will give that same much preferred age. What is my much preferred age?

No answer provided, you can do this easily yourself! I shall declare myself age fluid and use my much preferred age rather than my calendrical age to stay in my prime forever.

The Fountain of Youth

fresco by Jacques Iverny 1411