Yesterday I drove by 1818 Main Street, which I reflexively added together and got another 18, which made me happy. Then I noticed that it was the only four-digit number like that, and started thinking about the general property of numbers like that, and started calling the property of numbers that you can use to construct numbers like that "demureness", and started annoying Aaron in the global marketing strategy meeting this morning with it.

But I found 1818 interesting particularly because it was the first one.