| Nominal | 21138 |
| Cardinal | twenty-one thousand one hundred thirty-eight |
Cardinal twenty-one thousand one hundred thirty-eight | |
| Ordinal | 21,138th |
| Number of digits | 5 |
| Sum of digits | 15 |
| Product of digits | 48 |
| Number parity | Even |
| Prime factorization | 2 x 3 x 13 x 271 |
| Prime factors | 2, 3, 13, 271 |
| Number of distinct prime factors ω(n) | 4 |
| Total number of prime factors Ω(n) | 4 |
| Sum of prime factors | 289 |
| Product of prime factors | 21138 |
| Is 21138 a prime number? | No |
| Is 21138 a semiprime number? | No |
| Is 21138 a Chen prime number? | No |
| Is 21138 a Mersenne prime number? | No |
| Is 21138 a Catalan number? | No |
| Is 21138 a Fibonacci number? | No |
| Is 21138 a Idoneal number? | No |
| Square of 21138 (n2) | 446815044 |
| Cube of 21138 (n3) | 9444776400072 |
| Square root of 21138 | 145.38913301894 |
| Natural Logarithm (ln) of 21138 | 9.9588276475693 |
| Decimal Logarithm (log) of 21138 | 4.3250638935649 |
| Sine of 21138 | 0.97882220660681 |
| Cosecant of 21138 | 1.0216359960473 |
| Cosine of 21138 | 0.20471220738729 |
| Secant of 21138 | 4.8849065366586 |
| Tangent of 21138 | 4.7814549952802 |
| Cotangent of 21138 | 0.20914135989717 |
| The spelling of 21138 in words is "twenty-one thousand one hundred thirty-eight", meaning that: |
| 21138 is not an aban number (as it contains the letter a) |
| 21138 is not an eban number (as it contains the letter e) |
| 21138 is not an iban number (as it contains the letter i) |
| 21138 is not an oban number (as it contains the letter o) |
| 21138 is not a tban number (as it contains the letter t) |
| 21138 is not an uban number (as it contains the letter u) |
| Bengali numerals | ২১১৩৮ |
| Eastern Arabic numerals | ٢١٬١٣٨ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓂭𓆼𓍢𓎈𓐁 |
| Khmer numerals | ២១១៣៨ |
| Japanese numerals | 二万千百三十八 |
| Roman numerals | n/a |
| Thai numerals | ๒๑๑๓๘ |
| Arabic | واحد و عشرون ألف و مائة و ثمانية و ثلاثون |
| Croatian | dvadeset i jedna tisuća sto trideset i osam |
| Czech | dvacet jedna tisíc sto třicet osm |
| Danish | en og tyve tusinde et hundrede otte og tredive |
| Dutch | éénentwintigduizend honderdachtendertig |
| Estonian | akpe blaeve vɔ ɖekɛ alafa ɖeka blaetɔ̃ vɔ enyi |
| Faroese | tjúgoeitt tusin og eitthundraðogtríatiátta |
| Filipino | dalawáng pû’t isáng libó’t isáng daán at tatlóng pû’t waló |
| Finnish | kaksikymmentäyksituhattasatakolmekymmentäkahdeksan |
| French | vingt et un mille cent trente-huit |
| Greek | είκοσι μία χίλιάδες εκατόν τριάντα οκτώ |
| German | einundzwanzigtausendeinhundertachtunddreißig |
| Hebrew | עשרים ואחד אלף מאה שלושים ושמונה |
| Hindi | इक्कीस हज़ार एक सौ अड़तीस |
| Hungarian | huszonegyezerszázharmincnyolc |
| Icelandic | tuttugu og eitt þúsund og eitthundrað og þrjátíu og átta |
| Indonesian | dua puluh satu ribu seratus tiga puluh delapan |
| Italian | ventunomilacentotrentotto |
| Japanese | 二万千百三十八 |
| Korean | 이만 천백삼십팔 |
| Latvian | divdesmit viens tūkstoši simt trīsdesmit astoņi |
| Lithuanian | dvidešimt vienas tūkstantis šimtas trisdešimt aštuoni |
| Norwegian | tjueett tusen hundre og trettiåtte |
| Persian | بیست و یک هزار و صد و سی و هشت |
| Polish | dwadzieścia jeden tysięcy sto trzydzieści osiem |
| Portuguese | vinte e um mil cento e trinta e oito |
| Romanian | douăzeci şi una mii una sută treizeci şi opt |
| Russian | двадцать одна тысяча сто тридцать восемь |
| Serbian | двадесет и једна хиљада сто тридесет и осам |
| Slovak | dvadsaťjedna tisíc jednasto tridsaťosem |
| Slovene | dvaset ena tisuću sto trideset osem |
| Spanish | veintiún mil ciento treinta y ocho |
| Swahili | elfu ishirini na moja, mia moja na thelathini na nane |
| Swedish | tjugoentusenenhundratrettioåtta |
| Thai | สองหมื่นหนึ่งพันหนึ่งร้อยสามสิบแปด |
| Turkish | yirmi bir bin yüz otuz sekiz |
| Ukrainian | двадцять одна тисяча сто тридцять вісім |
| Vietnamese | hai mươi mốt nghìn một trăm ba mươi tám |
| Number 21138 reversed | 83112 | |
| Unicode Character | U+5292 | 劒 |
| Unix Timestamp | Thu, 01 Jan 1970 05:52:18 +0000 | |