I believe that this question is missing some information and seems to refer to 'In Writing. Which is my question; In writing should one use digits to represent numbers? And if so would they still be considered adjectives? Because they are describing the noun number or whichever other noun they are describing.
There are 3*2*1 = 6 of them.
18
Expressed in digits, this is equal to 14,500,000.
There are 60480 numbers.
If you use each number once, there are six combinations.
Most people prefer to write numbers using digits since this is far shorter than writing out the relevant words.
9
arabic numbers or decimal numbers
22, 28, 82 and 88.
874321 is the largest number made from all these digits.
99999
There are 3*2*1 = 6 of them.
You would need infinitely many digits to write all numbers. However, to write all whole number (integers) you would need 4243.
24.
-- The decimal system (base-10) uses 10 digits to write all numbers. -- The binary system (base-2) uses 2 digits to write all numbers.
6.0014
0.0001