A Unique Number

What is unique about the number 8,549,176,320? Click below to see the answer (and a bonus question).

There's nothing numerically particularly unique or interesting about the number above. It is made up of all of the digits from 0 to 9, but a lot of numbers have that property. The unique thing about this number is that all of the digits from 0 to 9 are in alphabetical order when spelled out in English.

Bonus question: Can you think of a number whose letters when spelled out in English are all in alphabetical order? Example: The first three letters of the word "five" are in alphabetical order, but the "e" at the end spoils it.