| Nominal | 18861 |
| Cardinal | eighteen thousand eight hundred sixty-one |
Cardinal eighteen thousand eight hundred sixty-one | |
| Ordinal | 18,861st |
| Number of digits | 5 |
| Sum of digits | 24 |
| Product of digits | 384 |
| Number parity | Odd |
| Prime factorization | 3 x 6287 |
| Prime factors | 3, 6287 |
| Number of distinct prime factors ω(n) | 2 |
| Total number of prime factors Ω(n) | 2 |
| Sum of prime factors | 6290 |
| Product of prime factors | 18861 |
| Is 18861 a prime number? | No |
| Is 18861 a semiprime number? | Yes |
| Is 18861 a Chen prime number? | No |
| Is 18861 a Mersenne prime number? | No |
| Is 18861 a Catalan number? | No |
| Is 18861 a Fibonacci number? | No |
| Is 18861 a Idoneal number? | No |
| Square of 18861 (n2) | 355737321 |
| Cube of 18861 (n3) | 6709561611381 |
| Square root of 18861 | 137.33535597216 |
| Natural Logarithm (ln) of 18861 | 9.8448515770512 |
| Decimal Logarithm (log) of 18861 | 4.2755647150698 |
| Sine of 18861 | -0.90109672763249 |
| Cosecant of 18861 | -1.1097587743187 |
| Cosine of 18861 | 0.43361813551789 |
| Secant of 18861 | 2.3061766058415 |
| Tangent of 18861 | -2.0780881928664 |
| Cotangent of 18861 | -0.48121153059469 |
| The spelling of 18861 in words is "eighteen thousand eight hundred sixty-one", meaning that: |
| 18861 is not an aban number (as it contains the letter a) |
| 18861 is not an eban number (as it contains the letter e) |
| 18861 is not an iban number (as it contains the letter i) |
| 18861 is not an oban number (as it contains the letter o) |
| 18861 is not a tban number (as it contains the letter t) |
| 18861 is not an uban number (as it contains the letter u) |
| Bengali numerals | ১৮৮৬১ |
| Eastern Arabic numerals | ١٨٬٨٦١ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍩𓎋𓏺 |
| Khmer numerals | ១៨៨៦១ |
| Japanese numerals | 一万八千八百六十一 |
| Roman numerals | n/a |
| Thai numerals | ๑๘๘๖๑ |
| Arabic | ثمانية عشر ألف و ثمانية مائة و واحد و ستون |
| Croatian | osamnaest tisuća osamsto šezdeset i jedan |
| Czech | osmnáct tisíc osm set šedesát jeden |
| Danish | atten tusinde otte hundrede en og tres |
| Dutch | achttienduizend achthonderdéénenzestig |
| Estonian | akpe wuienyi alafa enyi blaade vɔ ɖekɛ |
| Faroese | átjan tusin og áttahundraðogsekstiein |
| Filipino | labíng-walóng libó’t walóng daán at anim na pû’t isá |
| Finnish | kahdeksantoistatuhattakahdeksansataakuusikymmentäyksi |
| French | dix-huit mille huit cent soixante et un |
| Greek | δεκαοκτώ χίλιάδες οκτακόσια εξήντα ένα |
| German | achtzehntausendachthunderteinundsechzig |
| Hebrew | שמונה עשר אלף שמונה מאות שישים ואחת |
| Hindi | अठारह हज़ार आठ सौ इकसठ |
| Hungarian | tizennyolcezernyolcszázhatvanegy |
| Icelandic | átján þúsund og áttahundrað og sextíu og einn |
| Indonesian | delapan belas ribu delapan ratus enam puluh satu |
| Italian | diciottomilaottocentosessantuno |
| Japanese | 一万八千八百六十一 |
| Korean | 만 팔천팔백육십일 |
| Latvian | astoņpadsmit tūkstoši astoņsimt sešdesmit viens |
| Lithuanian | aštuoniolika tūkstančių aštuoni šimtai šešiasdešimt vienas |
| Norwegian | atten tusen åtte hundre og sekstién |
| Persian | هجده هزار و هشتصد و شصت و یک |
| Polish | osiemnaście tysięcy osiemset sześćdziesiąt jeden |
| Portuguese | dezoito mil oitocentos e sessenta e um |
| Romanian | optsprezece mii opt sute şasezeci şi unu |
| Russian | восемнадцать тысяч восемьсот шестьдесят один |
| Serbian | осамнаест хиљада осамсто шездесет и један |
| Slovak | osemnásť tisíc osemsto šesťdesiatjeden |
| Slovene | asemnajst tisuću osemsto šestdeset ena |
| Spanish | dieciocho mil ochocientos sesenta y uno |
| Swahili | elfu kumi na nane, mia nane na sitini na moja |
| Swedish | artontusenåttahundrasextioen |
| Thai | หนึ่งหมื่นแปดพันแปดร้อยหกสิบเอ็ด |
| Turkish | on sekiz bin sekiz yüz altmış bir |
| Ukrainian | вісімнадцять тисяч вісімсот шістдесят один |
| Vietnamese | mười tám nghìn tám trăm sáu mươi mốt |
| Number 18861 reversed | 16881 | |
| Unicode Character | U+49AD | 䦭 |
| Unix Timestamp | Thu, 01 Jan 1970 05:14:21 +0000 | |