XXVII vs twenty-seven

XXVII and twenty-seven both are nouns.

Word	Noun	Adjective	Verb	Adverb
XXVII	Yes	No	No	No
twenty-seven	Yes	Yes	No	No

As nouns, XXVII and twenty-seven are synonyms defined as:

XXVII and twenty-seven: the cardinal number that is the sum of twenty-six and one

Other synonyms of XXVII include 27.

XXVII (noun)	twenty-seven (noun)
the cardinal number that is the sum of twenty-six and one	the cardinal number that is the sum of twenty-six and one

XXVII (adjective)	twenty-seven (adjective)
	being seven more than twenty