There are only two known pure number name anagram equations in English except rearrangements of their words. Naturally I exclude the infinite tautologies that swap whole digits. It's a matter of opinion whether to count tautologies that swap a non-digit suffix. Such suffix swaps occur in the teens in Spanish, Italian, French, Portuguese, German, Danish, Swedish, Norwegian, transliterated Russian, Slovene and Arabic, and no doubt other languages, but not Dutch, Welsh or transliterated Hebrew, Hindi, Chinese or Japanese.
Word Ways: Vol. 44
, Article 7.
Available at: http://digitalcommons.butler.edu/wordways/vol44/iss2/7