twenty-three vs 23

twenty-three and 23 both are nouns.

Word	Noun	Adjective	Verb	Adverb
twenty-three	Yes	Yes	No	No
23	Yes	Yes	No	No

As adjectives, twenty-three and 23 are synonyms defined as:

Other synonyms of twenty-three include xxiii.

As nouns, twenty-three and 23 are synonyms defined as:

twenty-three and 23: the cardinal number that is the sum of twenty-two and one

Other synonyms of twenty-three include XXIII.

twenty-three (noun)	23 (noun)
the cardinal number that is the sum of twenty-two and one	the cardinal number that is the sum of twenty-two and one

twenty-three (adjective)	23 (adjective)
being three more than twenty	being three more than twenty