Here’s some perspective on the U.S. national debt as it approaches $20 trillion

The U.S. national debt is closing in on $20 trillion. That’s $20 thousand billion. Or $20 million million. If you stacked 20 trillion worth of thousand-dollar bills, it would supposedly reach something like 1,200 miles high. If you lived to be 80 years old, you’d have to spend about $700 million a day to run out of money.