And come on, you can sanity check those numbers.
"1 G is approximately equal to 22 miles/hour^2."
Think about this. That means it would take you an hour to reach 22mph.
The real speed you'll be going is 22 miles per second.
And sqrt(14753561838 / 132) is 10572, not 84331. That's not even close.
Also it used the Voyager 1 distance which is significantly different.
Once we fix all the numbers, each half of the trip is sqrt(20 billion km / 60m/s^2) which is a week. So two weeks total.
At 1G, each half is 16.4 days, so it takes a month total.