If Derf was in Toonnumbers, then I would make Derf be a nonbinary character because Derf is between 5 and 6 (Which is actually 5.5 that is actually 5.5, not Derf.) For the characters: Derf: They never talk nor move (but they move to a different spot if you look away) and they always have a creepy smile on their face. But they are actually very stupid on the inside, but the numbers think Derf is scary on the outside. Derfteen: Like Derf, they never talk, and rarely moves. But they always have a derpy look on their face, and often flops onto the ground for no reason. Derfty: They are even more stupider than Derf. They can't decide on anything, nor what gender they are (They once made their lashes longer and looks female). Derfty often acts like Derf, but unlike Derf, Derfty talks. If any number gets an answer that contains Derf, they would all run away. Even the numbers would split off from a Derf-Containing number, leaving Derf/Derfteen/Derfty alone with stupid faces.
But that doesn't mean that the Toonnumbers are doomed. They still have drama-free lives and happy endings and will be safe, free, protected, and saved. Derf/Derfteen/Derfty are uncanon numbers from iCarly.