Writing for scientific types::: I usually went with Arabic numerals because nerds of a future group together. However, be careful when writing scientific notation since something like the size of an election or the size of the universe written this way may cause a nerd's eyes to spin uncontrollably and may provide a rare orgasmic experience to their lives.
Artistic & Poetic ::: I always go with written. Too many (000) zeros confuse the artistic mind and the statistically mindless. Also, artistic types will take 0's written on a page and get lost in a a plethora of their own oodles of doodles, etc. ooo0ooooooooooOOOOOooooooooooooooooooooooooooo WOOOoOoW! Ten-billion, is how Shakespeare would have written this number for actors, and also a number referring to the number of people who doth hath no idea about what he is writing about.
Financial ::: Over $10,000,000 and selling something for your profit, always use zeros (0) especially with writings are directed to Realtors (except Donald Trump). They will salivate to your advantage. If selling something to make you a billionaire, use a larger type in bold, in bright red and other undulating colors. If buying/selling to save your ass from bankruptcy use no numbers, but link to a picture of Hawaii wahinis hula-dancing with the numbers hidden in their belly-buttons.
Perhaps twenty-four cups (24 cups) of coffee today may be too much. Just kidding around, Alan. I know about love for a wife when ill, I hope I gave you a chuckle. Still playing? My fingers went South because of a neurological problem. Best to you. Hope to be back with a Sci-Fi comedy very soon.
i was max keanu in the past