The word even in the first sentence is an adverb, since it is an "external" modifier, modifying camels as a noun phrase (compare even these camels ...), whereas the word even in the second sentence is an adjective, since it is an "internal" modifier, modifying numbers as a noun (compare these even numbers ...). It is nonetheless possible for certain adverbs to modify a noun; in English the adverb follows the noun in such cases,[1] as in:
The people here are friendly
The show features dances galore
There is a shortage internationally of protein for animal feeds
Adverbs can sometimes be used as predicative expressions; in English this applies especially to adverbs of location:
Your seat is there.
When the function of an adverb is performed by an expression consisting of more than one word, it is called an adverbial phrase or adverbial clause, or simply an adverbial.
§Formation and comparison