| Nominal | 16981 |
| Cardinal | sixteen thousand nine hundred eighty-one |
Cardinal sixteen thousand nine hundred eighty-one | |
| Ordinal | 16,981st |
| Number of digits | 5 |
| Sum of digits | 25 |
| Product of digits | 432 |
| Number parity | Odd |
| Prime factorization | 16981 |
| Prime factors | 16981 |
| Number of distinct prime factors ω(n) | 1 |
| Total number of prime factors Ω(n) | 1 |
| Sum of prime factors | 16981 |
| Product of prime factors | 16981 |
| Is 16981 a prime number? | Yes |
| Is 16981 a semiprime number? | No |
| Is 16981 a Chen prime number? | No |
| Is 16981 a Mersenne prime number? | No |
| Is 16981 a Catalan number? | No |
| Is 16981 a Fibonacci number? | No |
| Is 16981 a Idoneal number? | No |
| Square of 16981 (n2) | 288354361 |
| Cube of 16981 (n3) | 4896545404141 |
| Square root of 16981 | 130.31116606032 |
| Natural Logarithm (ln) of 16981 | 9.7398503509463 |
| Decimal Logarithm (log) of 16981 | 4.2299632619794 |
| Sine of 16981 | -0.63785303851776 |
| Cosecant of 16981 | -1.5677592479982 |
| Cosine of 16981 | -0.77015810146597 |
| Secant of 16981 | -1.298434695547 |
| Tangent of 16981 | 0.82821051587152 |
| Cotangent of 16981 | 1.207422485994 |
| The spelling of 16981 in words is "sixteen thousand nine hundred eighty-one", meaning that: |
| 16981 is not an aban number (as it contains the letter a) |
| 16981 is not an eban number (as it contains the letter e) |
| 16981 is not an iban number (as it contains the letter i) |
| 16981 is not an oban number (as it contains the letter o) |
| 16981 is not a tban number (as it contains the letter t) |
| 16981 is not an uban number (as it contains the letter u) |
| Bengali numerals | ১৬৯৮১ |
| Eastern Arabic numerals | ١٦٬٩٨١ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓆼𓆼𓆼𓆼𓆼𓆼𓍪𓎍𓏺 |
| Khmer numerals | ១៦៩៨១ |
| Japanese numerals | 一万六千九百八十一 |
| Roman numerals | n/a |
| Thai numerals | ๑๖๙๘๑ |
| Arabic | ستة عشر ألف و تسعة مائة و واحد و ثمانون |
| Croatian | šesnaest tisuća devetsto osamdeset i jedan |
| Czech | šestnáct tisíc devět set osmdesát jeden |
| Danish | seksten tusinde ni hundrede en og firs |
| Dutch | zestienduizend negenhonderdéénentachtig |
| Estonian | akpe wuiade alafa asieke blaenyi vɔ ɖekɛ |
| Faroese | sekstan tusin og níggjuhundraðogáttatiein |
| Filipino | labíng-anim na libó’t siyám na daán at walóng pû’t isá |
| Finnish | kuusitoistatuhattayhdeksänsataakahdeksankymmentäyksi |
| French | seize mille neuf cent quatre-vingt-un |
| Greek | δεκαέξι χίλιάδες εννιακόσια ογδόντα ένα |
| German | sechzehntausendneunhunderteinundachtzig |
| Hebrew | שישה עשר אלף תשע מאות שמונים ואחת |
| Hindi | सोलह हज़ार नौ सौ इक्यासी |
| Hungarian | tizenhatezerkilencszáznyolcvanegy |
| Icelandic | sextán þúsund og níuhundrað og áttatíu og einn |
| Indonesian | enam belas ribu sembilan ratus delapan puluh satu |
| Italian | sedicimilanovecentoottantuno |
| Japanese | 一万六千九百八十一 |
| Korean | 만 육천구백팔십일 |
| Latvian | sešpadsmit tūkstoši deviņsimt astoņdesmit viens |
| Lithuanian | šešiolika tūkstančių devyni šimtai aštuoniasdešimt vienas |
| Norwegian | seksten tusen ni hundre og åttién |
| Persian | شانزده هزار و نهصد و هشتاد و یک |
| Polish | szesnaście tysięcy dziewięćset osiemdziesiąt jeden |
| Portuguese | dezesseis mil novecentos e oitenta e um |
| Romanian | şasesprezece mii nouă sute optzeci şi unu |
| Russian | шестнадцать тысяч девятьсот восемьдесят один |
| Serbian | шеснаест хиљада деветсто осамдесет и један |
| Slovak | šestnásť tisíc deväťsto osemdesiatjeden |
| Slovene | šestnajst tisuću devetsto osemdeset ena |
| Spanish | dieciseis mil novecientos ochenta y uno |
| Swahili | elfu kumi na sita, mia tisa na themanini na moja |
| Swedish | sextontusenniohundraåttioen |
| Thai | หนึ่งหมื่นหกพันเก้าร้อยแปดสิบเอ็ด |
| Turkish | on altı bin dokuz yüz seksen bir |
| Ukrainian | шістнадцять тисяч девʼятсот вісімдесят один |
| Vietnamese | mười sáu nghìn chín trăm tám mươi mốt |
| Number 16981 reversed | 18961 | |
| Unicode Character | U+4255 | 䉕 |
| Unix Timestamp | Thu, 01 Jan 1970 04:43:01 +0000 | |