Meanings
noundeficient number (plural deficient numbers)
plural deficient numbers
- mathematicsA number that is greater than the sum of all of its divisors except itself.
The factors of 22 are 1, 2 and 11 and 22, and 1 + 2 + 11 = 14, which is less than 22, so 22 is a deficient number.
Synonyms: defective number
Synonyms & antonyms
nounA number that is greater than the sum of all of its divisors except itself.
Similar
Translations
Chinese Mandarin 虧數 /亏数, 不足數 /不足数
- 虧數 /亏数deficient number
- 不足數 /不足数deficient number
- 缺數 /缺数deficient number
Finnish vajaa luku
- vajaa lukudeficient number
French nombre déficient
- nombre déficientdeficient number
German defizienten Zahl
- defizienten Zahldeficient number
Japanese 不足数
- 不足数 (fusokusū)deficient number
Korean 부족수
- 부족수 (bujoksu)deficient number
Latin numerus diminutivus
- numerus diminutivusdeficient number
Polish liczby deficytowa, liczba niedostateczna
- liczby deficytowadeficient number
- liczba niedostatecznadeficient number
Spanish número defectivo
- número defectivodeficient number
Swedish defekt tal
- defekt taldeficient number
Cite this entry
APA
deficient number. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/deficient%20number
MLA
“deficient number.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/deficient%20number. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “deficient number,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/deficient%20number.
Source: deficient number on Wiktionary, CC BY-SA 4.0.