("Twenty five" and "twenty three" should be hyphenated.) Read more about hyphens and dashes between numbers.

Do you use a hyphen when writing numbers?

Use a hyphen when writing two-word numbers from twenty-one to ninety-nine (inclusive) as words. But don't use a hyphen for hundreds, thousands, millions and billions.

Does the word Twenty three have a hyphen?

You should always hyphenate numbers when you are describing compound numbers between 21 and 99 (except 30, 40, 50, 60, 70, 80 and 90). A compound number is any number that consists of two words; for example, eighty-eight, twenty-two, forty-nine. Numbers higher than 99 do not need a hyphen.