From this post on Zerohedge:

Since these numbers are simply too big for most to comprehend, here is a helpful visualization for what we are talking about courtesy of Demonocracy.info.

https://assets.zerohedge.com/s3fs-public/styles/inline_image_mobile/public/inline-images/30%20trillion%20in%20debt.jpg

America's $30 Trillion Debt In One Stunning Visualization https://www.zerohedge.com/markets/americas-30-trillion-debt-one-stunning-visualization