Word.ws English Dictionary

autobiographical number

autobiographical number noun: a number in which the first digit counts the number of zeroes in the number, the second digit counts the number of ones, etc. (i.e. the nᵗʰ digit counts the number of the digit n-1).

Noun

autobiographical number (plural autobiographical numbers)

  1. A number in which the first digit counts the number of zeroes in the number, the second digit counts the number of ones, etc. (i.e. the nᵗʰ digit counts the number of the digit n-1).
    • Martin Gardner gives a puzzle about a ten-digit autobiographical number 6210001000 in his book “Mathematical Circus” [1]. Discussing the solution to his puzzle he mentions the name “tally numbers” for such numbers.
      All autobiographical numbers are calculated by Fred Gavin in [2]. He calls these...2008 March 2, Tanya Khovanova, “Autobiographical Numbers”, in arXiv, page 8

Forms of autobiographical number

pluralautobiographical numbers

Questions about autobiographical number

What does autobiographical number mean?
Autobiographical number means a number in which the first digit counts the number of zeroes in the number, the second digit counts the number of ones, etc. (i.e. the nᵗʰ digit counts the number of the digit n-1).
What part of speech is autobiographical number?
Autobiographical number is a noun.
What is the plural of autobiographical number?
The plural of autobiographical number is autobiographical numbers.

Words near autobiographical number in the dictionary

  1. autobiographal
  2. autobiographer
  3. autobiographers
  4. autobiographic
  5. autobiographical
  6. autobiographical number
  7. autobiographical numbers
  8. autobiographicalize
  9. autobiographicalized
  10. autobiographicalizes
  11. autobiographicalizing

Source and license

Adapted from Wiktionary: autobiographical number (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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