| Nominal | 20987 |
| Cardinal | twenty thousand nine hundred eighty-seven |
Cardinal twenty thousand nine hundred eighty-seven | |
| Ordinal | 20,987th |
| Number of digits | 5 |
| Sum of digits | 26 |
| Product of digits | 0 |
| Number parity | Odd |
| Prime factorization | 31 x 677 |
| Prime factors | 31, 677 |
| Number of distinct prime factors ω(n) | 2 |
| Total number of prime factors Ω(n) | 2 |
| Sum of prime factors | 708 |
| Product of prime factors | 20987 |
| Is 20987 a prime number? | No |
| Is 20987 a semiprime number? | Yes |
| Is 20987 a Chen prime number? | No |
| Is 20987 a Mersenne prime number? | No |
| Is 20987 a Catalan number? | No |
| Is 20987 a Fibonacci number? | No |
| Is 20987 a Idoneal number? | No |
| Square of 20987 (n2) | 440454169 |
| Cube of 20987 (n3) | 9243811644803 |
| Square root of 20987 | 144.86890625666 |
| Natural Logarithm (ln) of 20987 | 9.9516584773974 |
| Decimal Logarithm (log) of 20987 | 4.3219503625194 |
| Sine of 20987 | 0.91723147862802 |
| Cosecant of 20987 | 1.0902373319064 |
| Cosine of 20987 | 0.39835463423169 |
| Secant of 20987 | 2.5103260112154 |
| Tangent of 20987 | 2.3025500391055 |
| Cotangent of 20987 | 0.43430109357731 |
| The spelling of 20987 in words is "twenty thousand nine hundred eighty-seven", meaning that: |
| 20987 is not an aban number (as it contains the letter a) |
| 20987 is not an eban number (as it contains the letter e) |
| 20987 is not an iban number (as it contains the letter i) |
| 20987 is not an oban number (as it contains the letter o) |
| 20987 is not a tban number (as it contains the letter t) |
| 20987 is not an uban number (as it contains the letter u) |
| Bengali numerals | ২০৯৮৭ |
| Eastern Arabic numerals | ٢٠٬٩٨٧ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓂭𓍪𓎍𓐀 |
| Khmer numerals | ២០៩៨៧ |
| Japanese numerals | 二万九百八十七 |
| Roman numerals | n/a |
| Thai numerals | ๒๐๙๘๗ |
| Arabic | عشرون ألف و تسعة مائة و سبعة و ثمانون |
| Croatian | dvadeset tisuća devetsto osamdeset i sedam |
| Czech | dvacet tisíc devět set osmdesát sedm |
| Danish | tyve tusinde ni hundrede syv og firs |
| Dutch | twintigduizend negenhonderdzevenentachtig |
| Estonian | akpe blaeve alafa asieke blaenyi vɔ adre |
| Faroese | tjúgo tusin og níggjuhundraðogáttatisjey |
| Filipino | dalawáng pû libó’t siyám na daán at walóng pû’t pitó |
| Finnish | kaksikymmentätuhattayhdeksänsataakahdeksankymmentäseitsemän |
| French | vingt mille neuf cent quatre-vingt-sept |
| Greek | είκοσι χίλιάδες εννιακόσια ογδόντα επτά |
| German | zwanzigtausendneunhundertsiebenundachtzig |
| Hebrew | עשרים אלף תשע מאות שמונים ושבע |
| Hindi | बीस हज़ार नौ सौ सत्तासी |
| Hungarian | húszezerkilencszáznyolcvanhét |
| Icelandic | tuttugu þúsund og níuhundrað og áttatíu og sjó |
| Indonesian | dua puluh ribu sembilan ratus delapan puluh tujuh |
| Italian | ventimilanovecentoottantasette |
| Japanese | 二万九百八十七 |
| Korean | 이만 구백팔십칠 |
| Latvian | divdesmit tūkstoši deviņsimt astoņdesmit septiņi |
| Lithuanian | dvidešimt tūkstančių devyni šimtai aštuoniasdešimt septyni |
| Norwegian | tjue tusen ni hundre og åttisju |
| Persian | بیست هزار و نهصد و هشتاد و هفت |
| Polish | dwadzieścia tysięcy dziewięćset osiemdziesiąt siedem |
| Portuguese | vinte mil novecentos e oitenta e sete |
| Romanian | douăzeci mii nouă sute optzeci şi şapte |
| Russian | двадцать тысяч девятьсот восемьдесят семь |
| Serbian | двадесет хиљада деветсто осамдесет и седам |
| Slovak | dvadsať tisíc deväťsto osemdesiatsedem |
| Slovene | dvaset tisuću devetsto osemdeset sedem |
| Spanish | veinte mil novecientos ochenta y siete |
| Swahili | elfu ishirini, mia tisa na themanini na saba |
| Swedish | tjugotusenniohundraåttiosju |
| Thai | สองหมื่นเก้าร้อยแปดสิบเจ็ด |
| Turkish | yirmi bin dokuz yüz seksen yedi |
| Ukrainian | двадцять тисяч девʼятсот вісімдесят сім |
| Vietnamese | hai mươi nghìn chín trăm tám mươi bảy |
| Number 20987 reversed | 78902 | |
| Unicode Character | U+51FB | 击 |
| Unix Timestamp | Thu, 01 Jan 1970 05:49:47 +0000 | |