| Nominal | 21790 |
| Cardinal | twenty-one thousand seven hundred ninety |
Cardinal twenty-one thousand seven hundred ninety | |
| Ordinal | 21,790th |
| Number of digits | 5 |
| Sum of digits | 19 |
| Product of digits | 0 |
| Number parity | Even |
| Prime factorization | 2 x 5 x 2179 |
| Prime factors | 2, 5, 2179 |
| Number of distinct prime factors ω(n) | 3 |
| Total number of prime factors Ω(n) | 3 |
| Sum of prime factors | 2186 |
| Product of prime factors | 21790 |
| Is 21790 a prime number? | No |
| Is 21790 a semiprime number? | No |
| Is 21790 a Chen prime number? | No |
| Is 21790 a Mersenne prime number? | No |
| Is 21790 a Catalan number? | No |
| Is 21790 a Fibonacci number? | No |
| Is 21790 a Idoneal number? | No |
| Square of 21790 (n2) | 474804100 |
| Cube of 21790 (n3) | 10345981339000 |
| Square root of 21790 | 147.61436244485 |
| Natural Logarithm (ln) of 21790 | 9.9892064279387 |
| Decimal Logarithm (log) of 21790 | 4.3382572302463 |
| Sine of 21790 | -0.086536925895127 |
| Cosecant of 21790 | -11.555760614976 |
| Cosine of 21790 | 0.99624864389199 |
| Secant of 21790 | 1.0037654817711 |
| Tangent of 21790 | -0.086862779112109 |
| Cotangent of 21790 | -11.51241084181 |
| The spelling of 21790 in words is "twenty-one thousand seven hundred ninety", meaning that: |
| 21790 is not an aban number (as it contains the letter a) |
| 21790 is not an eban number (as it contains the letter e) |
| 21790 is not an iban number (as it contains the letter i) |
| 21790 is not an oban number (as it contains the letter o) |
| 21790 is not a tban number (as it contains the letter t) |
| 21790 is not an uban number (as it contains the letter u) |
| Bengali numerals | ২১৭৯০ |
| Eastern Arabic numerals | ٢١٬٧٩٠ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓂭𓆼𓍨𓎎 |
| Khmer numerals | ២១៧៩០ |
| Japanese numerals | 二万千七百九十 |
| Roman numerals | n/a |
| Thai numerals | ๒๑๗๙๐ |
| Arabic | واحد و عشرون ألف و سبعة مائة و تسعون |
| Croatian | dvadeset i jedna tisuća sedamsto devedeset |
| Czech | dvacet jedna tisíc sedm set devadesát |
| Danish | en og tyve tusinde syv hundrede halvfems |
| Dutch | éénentwintigduizend zevenhonderdnegentig |
| Estonian | akpe blaeve vɔ ɖekɛ alafa adre kple blaasieke |
| Faroese | tjúgoeitt tusin og sjeyhundraðogníti |
| Filipino | dalawáng pû’t isáng libó’t pitóng daán at siyám na pû |
| Finnish | kaksikymmentäyksituhattaseitsemänsataayhdeksänkymmentä |
| French | vingt et un mille sept cent quatre-vingt-dix |
| Greek | είκοσι μία χίλιάδες επτακόσια εννενήντα |
| German | einundzwanzigtausendsiebenhundertneunzig |
| Hebrew | עשרים ואחד אלף שבע מאות תשעים |
| Hindi | इक्कीस हज़ार सात सौ नब्बे |
| Hungarian | huszonegyezerhétszázkilencven |
| Icelandic | tuttugu og eitt þúsund og sjóhundrað og níutíu |
| Indonesian | dua puluh satu ribu tujuh ratus sembilan puluh |
| Italian | ventunomilasettecentonovanta |
| Japanese | 二万千七百九十 |
| Korean | 이만 천칠백구십 |
| Latvian | divdesmit viens tūkstoši septiņsimt deviņdesmit |
| Lithuanian | dvidešimt vienas tūkstantis septyni šimtai devyniasdešimt |
| Norwegian | tjueett tusen sju hundre og nitti |
| Persian | بیست و یک هزار و هفتصد و نود |
| Polish | dwadzieścia jeden tysięcy siedemset dziewięćdziesiąt |
| Portuguese | vinte e um mil setecentos e noventa |
| Romanian | douăzeci şi una mii şapte sute nouăzeci |
| Russian | двадцать одна тысяча семьсот девяносто |
| Serbian | двадесет и једна хиљада седамсто деведесет |
| Slovak | dvadsaťjedna tisíc sedemsto deväťdesiat |
| Slovene | dvaset ena tisuću sedemsto devetdeset |
| Spanish | veintiún mil setecientos noventa |
| Swahili | elfu ishirini na moja, mia saba na tisini |
| Swedish | tjugoentusensjuhundranittio |
| Thai | สองหมื่นหนึ่งพันเจ็ดร้อยเก้าสิบ |
| Turkish | yirmi bir bin yedi yüz doksan |
| Ukrainian | двадцять одна тисяча сімсот девʼяносто |
| Vietnamese | hai mươi mốt nghìn bảy trăm chín mươi |
| Number 21790 reversed | 09712 | |
| Unicode Character | U+551E | 唞 |
| Unix Timestamp | Thu, 01 Jan 1970 06:03:10 +0000 | |