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Abstract

The spelling out of numbers in English words is a frequently studied topic by logologists. For example, it has long been known that the numbers 0, 1, 2, 4, 5, 6, 8, 10, 40, 46, 60, 61, 64, 80, 84, and 5000 are the only ones whose written-out names are heterograms (no letter of the alphabet occurs more than once).

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