Look up Conway's chained arrow notation and the fast-growing hierarchy.
Decimals occupy the spaces between whole numbers; they are bigger than some, and smaller than some others.
No, 3.5 is bigger than 2.5
184.6 is bigger than the rest of the numbers.
Yes, there is, but it has no name, for grahams number was and is still the largest number with a name. To make a number larger than grahams number, you just need to make grahams number 1, but it would not have a name because it is not official, and if you try to write it down, you could not, because all matter in the universe transformed into pen ink could not write it down. And if you tried to type it, your computer or whatever you where typing it on would fail.
Yes, 34 is a bigger number than 13. It represents more than 13, but in fractions, 13 is a bigger number. 1/13 is bigger than 1/34. So here is the answer: In positive numbers, yes. In fractions, no. In negative numbers, no.
No.
0.01 is 0.007 bigger than 0.003
Do you mean prime factors? If yes, then 143.
19.5 is bigger than 11 as both 19 and 11 are whole numbers.
No, it is never bigger than the smaller number.
No, it is never bigger than the smaller one.
Just look at the first numbers 3 and 2. Is 3 bigger than 2 or 2 bigger than 3. Of course 3 is bigger than 2 so .315 is bigger than .21