Others is only used as a pronoun. But 'other' has different grammatical functions. On the other hand, 'others' refers to more than one; while 'other' refers to only one thing.

Other, the other, another are pronouns when they are replacing a noun. They can be singular or plural. ‘Others’ vs. ‘the others’ Both are pronouns, that is, they stand for a noun. ‘Others’ is more vague, we are not determining how many others, or which other ones. ‘The others’ is more specific; it stands for all the rest.

A simple rule to help you remember the difference between another and other is: another + singular noun other + plural noun others (a pronoun to replace other + plural noun) I need another cup. (cup is singular so we use another) I need other cups. (cups is plural so we use other) I need others. (refers to other cups)

It’s correct to use “others” as the plural and “other’s” to talk about the singular possessive. You can use “others’” as a plural possessive, but it’s much more likely that you’ll require a secondary noun for this to make sense (i.e. “other people’s”).