The English word "four" has 4 letters. Are there any other numbers where the English name for them has that many letters?

Yes: Five has four letters. Nine has four letters.

There are no more.

If you meant to ask if there are any more whole numbers with the same number of letters in the name as the number, then the answer is no. It is fairly simple to check - you only have to look at the numbers 0-30 before it becomes clear no other number will fit this pattern.

If you went into fractions like 20.12325 then there will be many numbers where all the letters added would get close but the fraction itself would mean you couldn't quite reach the exact number as you can't have fractions of letters.

If you included negative numbers then "minus eleven" has 11 letters. Minus thirteen has 13 letters. It seems to again break down once you go beyond 13, and its dodgy to include negative numbers as you can't have negative letters.

So, no.

-9 (minus nine) kind of works if we’re getting desperate.

Yeah. Fivee. Siiiix. Seeveen. Eeeeight. Niiiiiiine.

I don't know in English, but in Spanish the word for five, Cinco, has five letters.

two to power of four = 16

The number one hundred million sixty six thousand five hundred seventy three has exactly 100,066,537 letters.

How about strokes? 一，二，三 😆

Remind me of the classic sequence where every number leads to 4.

10 -> 3 -> 5 -> 4

1024 -> 21 -> 9 -> 4

No. As a matter of fact, this is a neat party trick I used to use.

Start with literally any number, and count the letters to match it. You will always end up at four because it's the only English word and Arabic numeral represented with equivalent letters.

To

sephene