| Nominal | 20998 |
| Cardinal | twenty thousand nine hundred ninety-eight |
Cardinal twenty thousand nine hundred ninety-eight | |
| Ordinal | 20,998th |
| Number of digits | 5 |
| Sum of digits | 28 |
| Product of digits | 0 |
| Number parity | Even |
| Prime factorization | 2 x 10499 |
| Prime factors | 2, 10499 |
| Number of distinct prime factors ω(n) | 2 |
| Total number of prime factors Ω(n) | 2 |
| Sum of prime factors | 10501 |
| Product of prime factors | 20998 |
| Is 20998 a prime number? | No |
| Is 20998 a semiprime number? | Yes |
| Is 20998 a Chen prime number? | No |
| Is 20998 a Mersenne prime number? | No |
| Is 20998 a Catalan number? | No |
| Is 20998 a Fibonacci number? | No |
| Is 20998 a Idoneal number? | No |
| Square of 20998 (n2) | 440916004 |
| Cube of 20998 (n3) | 9258354251992 |
| Square root of 20998 | 144.90686664199 |
| Natural Logarithm (ln) of 20998 | 9.9521824740749 |
| Decimal Logarithm (log) of 20998 | 4.322177931385 |
| Sine of 20998 | -0.39429134345623 |
| Cosecant of 20998 | -2.5361956750922 |
| Cosine of 20998 | 0.91898549307129 |
| Secant of 20998 | 1.088156458986 |
| Tangent of 20998 | -0.42905067210419 |
| Cotangent of 20998 | -2.3307270329999 |
| The spelling of 20998 in words is "twenty thousand nine hundred ninety-eight", meaning that: |
| 20998 is not an aban number (as it contains the letter a) |
| 20998 is not an eban number (as it contains the letter e) |
| 20998 is not an iban number (as it contains the letter i) |
| 20998 is not an oban number (as it contains the letter o) |
| 20998 is not a tban number (as it contains the letter t) |
| 20998 is not an uban number (as it contains the letter u) |
| Bengali numerals | ২০৯৯৮ |
| Eastern Arabic numerals | ٢٠٬٩٩٨ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓂭𓍪𓎎𓐁 |
| Khmer numerals | ២០៩៩៨ |
| Japanese numerals | 二万九百九十八 |
| Roman numerals | n/a |
| Thai numerals | ๒๐๙๙๘ |
| Arabic | عشرون ألف و تسعة مائة و ثمانية و تسعون |
| Croatian | dvadeset tisuća devetsto devedeset i osam |
| Czech | dvacet tisíc devět set devadesát osm |
| Danish | tyve tusinde ni hundrede otte og halvfems |
| Dutch | twintigduizend negenhonderdachtennegentig |
| Estonian | akpe blaeve alafa asieke blaasieke vɔ enyi |
| Faroese | tjúgo tusin og níggjuhundraðognítiátta |
| Filipino | dalawáng pû libó’t siyám na daán at siyám na pû’t waló |
| Finnish | kaksikymmentätuhattayhdeksänsataayhdeksänkymmentäkahdeksan |
| French | vingt mille neuf cent quatre-vingt-dix-huit |
| Greek | είκοσι χίλιάδες εννιακόσια εννενήντα οκτώ |
| German | zwanzigtausendneunhundertachtundneunzig |
| Hebrew | עשרים אלף תשע מאות תשעים ושמונה |
| Hindi | बीस हज़ार नौ सौ अट्ठानबे |
| Hungarian | húszezerkilencszázkilencvennyolc |
| Icelandic | tuttugu þúsund og níuhundrað og níutíu og átta |
| Indonesian | dua puluh ribu sembilan ratus sembilan puluh delapan |
| Italian | ventimilanovecentonovantotto |
| Japanese | 二万九百九十八 |
| Korean | 이만 구백구십팔 |
| Latvian | divdesmit tūkstoši deviņsimt deviņdesmit astoņi |
| Lithuanian | dvidešimt tūkstančių devyni šimtai devyniasdešimt aštuoni |
| Norwegian | tjue tusen ni hundre og nittiåtte |
| Persian | بیست هزار و نهصد و نود و هشت |
| Polish | dwadzieścia tysięcy dziewięćset dziewięćdziesiąt osiem |
| Portuguese | vinte mil novecentos e noventa e oito |
| Romanian | douăzeci mii nouă sute nouăzeci şi opt |
| Russian | двадцать тысяч девятьсот девяносто восемь |
| Serbian | двадесет хиљада деветсто деведесет и осам |
| Slovak | dvadsať tisíc deväťsto deväťdesiatosem |
| Slovene | dvaset tisuću devetsto devetdeset osem |
| Spanish | veinte mil novecientos noventa y ocho |
| Swahili | elfu ishirini, mia tisa na tisini na nane |
| Swedish | tjugotusenniohundranittioåtta |
| Thai | สองหมื่นเก้าร้อยเก้าสิบแปด |
| Turkish | yirmi bin dokuz yüz doksan sekiz |
| Ukrainian | двадцять тисяч девʼятсот девʼяносто вісім |
| Vietnamese | hai mươi nghìn chín trăm chín mươi tám |
| Number 20998 reversed | 89902 | |
| Unicode Character | U+5206 | 分 |
| Unix Timestamp | Thu, 01 Jan 1970 05:49:58 +0000 | |