| Nominal | 21440 |
| Cardinal | twenty-one thousand four hundred forty |
Cardinal twenty-one thousand four hundred forty | |
| Ordinal | 21,440th |
| Number of digits | 5 |
| Sum of digits | 11 |
| Product of digits | 0 |
| Number parity | Even |
| Prime factorization | 2 x 2 x 2 x 2 x 2 x 2 x 5 x 67 |
| Prime factorization in exponent form | 26 x 5 x 67 |
| Prime factors | 2, 5, 67 |
| Number of distinct prime factors ω(n) | 3 |
| Total number of prime factors Ω(n) | 8 |
| Sum of prime factors | 74 |
| Product of prime factors | 670 |
| Is 21440 a prime number? | No |
| Is 21440 a semiprime number? | No |
| Is 21440 a Chen prime number? | No |
| Is 21440 a Mersenne prime number? | No |
| Is 21440 a Catalan number? | No |
| Is 21440 a Fibonacci number? | No |
| Is 21440 a Idoneal number? | No |
| Square of 21440 (n2) | 459673600 |
| Cube of 21440 (n3) | 9855401984000 |
| Square root of 21440 | 146.42404174179 |
| Natural Logarithm (ln) of 21440 | 9.9730136151847 |
| Decimal Logarithm (log) of 21440 | 4.3312247810207 |
| Sine of 21440 | 0.9798802785922 |
| Cosecant of 21440 | 1.020532836355 |
| Cosine of 21440 | -0.19958617092893 |
| Secant of 21440 | -5.010367177975 |
| Tangent of 21440 | -4.9095599862034 |
| Cotangent of 21440 | -0.20368424111532 |
| The spelling of 21440 in words is "twenty-one thousand four hundred forty", meaning that: |
| 21440 is not an aban number (as it contains the letter a) |
| 21440 is not an eban number (as it contains the letter e) |
| 21440 is an iban number (a number without the letter i) |
| 21440 is not an oban number (as it contains the letter o) |
| 21440 is not a tban number (as it contains the letter t) |
| 21440 is not an uban number (as it contains the letter u) |
| Bengali numerals | ২১৪৪০ |
| Eastern Arabic numerals | ٢١٬٤٤٠ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓂭𓆼𓍥𓎉 |
| Khmer numerals | ២១៤៤០ |
| Japanese numerals | 二万千四百四十 |
| Roman numerals | n/a |
| Thai numerals | ๒๑๔๔๐ |
| Arabic | واحد و عشرون ألف و أربعة مائة و أربعون |
| Croatian | dvadeset i jedna tisuća četiristo četrdeset |
| Czech | dvacet jedna tisíc čtyři sta čtyřicet |
| Danish | en og tyve tusinde fire hundrede fyrre |
| Dutch | éénentwintigduizend vierhonderdveertig |
| Estonian | akpe blaeve vɔ ɖekɛ alafa ene kple blaene |
| Faroese | tjúgoeitt tusin og fýrehundraðogfýrati |
| Filipino | dalawáng pû’t isáng libó’t ápat na daán at ápat na pû |
| Finnish | kaksikymmentäyksituhattaneljäsataaneljäkymmentä |
| French | vingt et un mille quatre cent quarante |
| Greek | είκοσι μία χίλιάδες τετρακόσια σαράντα |
| German | einundzwanzigtausendvierhundertvierzig |
| Hebrew | עשרים ואחד אלף ארבע מאות ארבעים |
| Hindi | इक्कीस हज़ार चार सौ चालीस |
| Hungarian | huszonegyezernégyszáznegyven |
| Icelandic | tuttugu og eitt þúsund og fjögurhundrað og fjörutíu |
| Indonesian | dua puluh satu ribu empat ratus empat puluh |
| Italian | ventunomilaquattrocentoquaranta |
| Japanese | 二万千四百四十 |
| Korean | 이만 천사백사십 |
| Latvian | divdesmit viens tūkstoši četrsimt četrdesmit |
| Lithuanian | dvidešimt vienas tūkstantis keturi šimtai keturiasdešimt |
| Norwegian | tjueett tusen fire hundre og førti |
| Persian | بیست و یک هزار و چهارصد و چهل |
| Polish | dwadzieścia jeden tysięcy czterysta czterdzieści |
| Portuguese | vinte e um mil quatrocentos e quarenta |
| Romanian | douăzeci şi una mii patru sute patruzeci |
| Russian | двадцать одна тысяча четыреста сорок |
| Serbian | двадесет и једна хиљада четиристо четрдесет |
| Slovak | dvadsaťjedna tisíc štyristo štyridsať |
| Slovene | dvaset ena tisuću štiristo štirideset |
| Spanish | veintiún mil cuatrocientos cuarenta |
| Swahili | elfu ishirini na moja, mia nne na arobaini |
| Swedish | tjugoentusenfyrahundrafyrtio |
| Thai | สองหมื่นหนึ่งพันสี่ร้อยสี่สิบ |
| Turkish | yirmi bir bin dört yüz kırk |
| Ukrainian | двадцять одна тисяча чотириста сорок |
| Vietnamese | hai mươi mốt nghìn bốn trăm bốn mươi |
| Number 21440 reversed | 04412 | |
| Unicode Character | U+53C0 | 叀 |
| Unix Timestamp | Thu, 01 Jan 1970 05:57:20 +0000 | |