| Nominal | 21420 |
| Cardinal | twenty-one thousand four hundred twenty |
Cardinal twenty-one thousand four hundred twenty | |
| Ordinal | 21,420th |
| Number of digits | 5 |
| Sum of digits | 9 |
| Product of digits | 0 |
| Number parity | Even |
| Prime factorization | 2 x 2 x 3 x 3 x 5 x 7 x 17 |
| Prime factorization in exponent form | 22 x 32 x 5 x 7 x 17 |
| Prime factors | 2, 3, 5, 7, 17 |
| Number of distinct prime factors ω(n) | 5 |
| Total number of prime factors Ω(n) | 7 |
| Sum of prime factors | 34 |
| Product of prime factors | 3570 |
| Is 21420 a prime number? | No |
| Is 21420 a semiprime number? | No |
| Is 21420 a Chen prime number? | No |
| Is 21420 a Mersenne prime number? | No |
| Is 21420 a Catalan number? | No |
| Is 21420 a Fibonacci number? | No |
| Is 21420 a Idoneal number? | No |
| Square of 21420 (n2) | 458816400 |
| Cube of 21420 (n3) | 9827847288000 |
| Square root of 21420 | 146.35573101181 |
| Natural Logarithm (ln) of 21420 | 9.9720803440017 |
| Decimal Logarithm (log) of 21420 | 4.3308194664958 |
| Sine of 21420 | 0.58208281127866 |
| Cosecant of 21420 | 1.717968613097 |
| Cosine of 21420 | 0.8131295104803 |
| Secant of 21420 | 1.2298163910068 |
| Tangent of 21420 | 0.71585498223381 |
| Cotangent of 21420 | 1.3969309773881 |
| The spelling of 21420 in words is "twenty-one thousand four hundred twenty", meaning that: |
| 21420 is not an aban number (as it contains the letter a) |
| 21420 is not an eban number (as it contains the letter e) |
| 21420 is an iban number (a number without the letter i) |
| 21420 is not an oban number (as it contains the letter o) |
| 21420 is not a tban number (as it contains the letter t) |
| 21420 is not an uban number (as it contains the letter u) |
| Bengali numerals | ২১৪২০ |
| Eastern Arabic numerals | ٢١٬٤٢٠ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓂭𓆼𓍥𓎇 |
| Khmer numerals | ២១៤២០ |
| Japanese numerals | 二万千四百二十 |
| Roman numerals | n/a |
| Thai numerals | ๒๑๔๒๐ |
| Arabic | واحد و عشرون ألف و أربعة مائة و عشرون |
| Croatian | dvadeset i jedna tisuća četiristo dvadeset |
| Czech | dvacet jedna tisíc čtyři sta dvacet |
| Danish | en og tyve tusinde fire hundrede tyve |
| Dutch | éénentwintigduizend vierhonderdtwintig |
| Estonian | akpe blaeve vɔ ɖekɛ alafa ene kple blaeve |
| Faroese | tjúgoeitt tusin og fýrehundraðogtjúgo |
| Filipino | dalawáng pû’t isáng libó’t ápat na daán at dalawáng pû |
| Finnish | kaksikymmentäyksituhattaneljäsataakaksikymmentä |
| French | vingt et un mille quatre cent vingt |
| Greek | είκοσι μία χίλιάδες τετρακόσια είκοσι |
| German | einundzwanzigtausendvierhundertzwanzig |
| Hebrew | עשרים ואחד אלף ארבע מאות עשרים |
| Hindi | इक्कीस हज़ार चार सौ बीस |
| Hungarian | huszonegyezernégyszázhúsz |
| Icelandic | tuttugu og eitt þúsund og fjögurhundrað og tuttugu |
| Indonesian | dua puluh satu ribu empat ratus dua puluh |
| Italian | ventunomilaquattrocentoventi |
| Japanese | 二万千四百二十 |
| Korean | 이만 천사백이십 |
| Latvian | divdesmit viens tūkstoši četrsimt divdesmit |
| Lithuanian | dvidešimt vienas tūkstantis keturi šimtai dvidešimt |
| Norwegian | tjueett tusen fire hundre og tjue |
| Persian | بیست و یک هزار و چهارصد و بیست |
| Polish | dwadzieścia jeden tysięcy czterysta dwadzieścia |
| Portuguese | vinte e um mil quatrocentos e vinte |
| Romanian | douăzeci şi una mii patru sute douăzeci |
| Russian | двадцать одна тысяча четыреста двадцать |
| Serbian | двадесет и једна хиљада четиристо двадесет |
| Slovak | dvadsaťjedna tisíc štyristo dvadsať |
| Slovene | dvaset ena tisuću štiristo dvaset |
| Spanish | veintiún mil cuatrocientos veinte |
| Swahili | elfu ishirini na moja, mia nne na ishirini |
| Swedish | tjugoentusenfyrahundratjugo |
| Thai | สองหมื่นหนึ่งพันสี่ร้อยยี่สิบ |
| Turkish | yirmi bir bin dört yüz yirmi |
| Ukrainian | двадцять одна тисяча чотириста двадцять |
| Vietnamese | hai mươi mốt nghìn bốn trăm hai mươi |
| Number 21420 reversed | 02412 | |
| Unicode Character | U+53AC | 厬 |
| Unix Timestamp | Thu, 01 Jan 1970 05:57:00 +0000 | |