| Nominal | 18998 |
| Cardinal | eighteen thousand nine hundred ninety-eight |
Cardinal eighteen thousand nine hundred ninety-eight | |
| Ordinal | 18,998th |
| Number of digits | 5 |
| Sum of digits | 35 |
| Product of digits | 5184 |
| Number parity | Even |
| Prime factorization | 2 x 7 x 23 x 59 |
| Prime factors | 2, 7, 23, 59 |
| Number of distinct prime factors ω(n) | 4 |
| Total number of prime factors Ω(n) | 4 |
| Sum of prime factors | 91 |
| Product of prime factors | 18998 |
| Is 18998 a prime number? | No |
| Is 18998 a semiprime number? | No |
| Is 18998 a Chen prime number? | No |
| Is 18998 a Mersenne prime number? | No |
| Is 18998 a Catalan number? | No |
| Is 18998 a Fibonacci number? | No |
| Is 18998 a Idoneal number? | No |
| Square of 18998 (n2) | 360924004 |
| Cube of 18998 (n3) | 6856834227992 |
| Square root of 18998 | 137.83323256748 |
| Natural Logarithm (ln) of 18998 | 9.8520889894501 |
| Decimal Logarithm (log) of 18998 | 4.278707883338 |
| Sine of 18998 | -0.70980669326085 |
| Cosecant of 18998 | -1.4088342776905 |
| Cosine of 18998 | -0.70439652057779 |
| Secant of 18998 | -1.419654939777 |
| Tangent of 18998 | 1.0076805783746 |
| Cotangent of 18998 | 0.99237796327587 |
| The spelling of 18998 in words is "eighteen thousand nine hundred ninety-eight", meaning that: |
| 18998 is not an aban number (as it contains the letter a) |
| 18998 is not an eban number (as it contains the letter e) |
| 18998 is not an iban number (as it contains the letter i) |
| 18998 is not an oban number (as it contains the letter o) |
| 18998 is not a tban number (as it contains the letter t) |
| 18998 is not an uban number (as it contains the letter u) |
| Bengali numerals | ১৮৯৯৮ |
| Eastern Arabic numerals | ١٨٬٩٩٨ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍪𓎎𓐁 |
| Khmer numerals | ១៨៩៩៨ |
| Japanese numerals | 一万八千九百九十八 |
| Roman numerals | n/a |
| Thai numerals | ๑๘๙๙๘ |
| Arabic | ثمانية عشر ألف و تسعة مائة و ثمانية و تسعون |
| Croatian | osamnaest tisuća devetsto devedeset i osam |
| Czech | osmnáct tisíc devět set devadesát osm |
| Danish | atten tusinde ni hundrede otte og halvfems |
| Dutch | achttienduizend negenhonderdachtennegentig |
| Estonian | akpe wuienyi alafa asieke blaasieke vɔ enyi |
| Faroese | átjan tusin og níggjuhundraðognítiátta |
| Filipino | labíng-walóng libó’t siyám na daán at siyám na pû’t waló |
| Finnish | kahdeksantoistatuhattayhdeksänsataayhdeksänkymmentäkahdeksan |
| French | dix-huit mille neuf cent quatre-vingt-dix-huit |
| Greek | δεκαοκτώ χίλιάδες εννιακόσια εννενήντα οκτώ |
| German | achtzehntausendneunhundertachtundneunzig |
| Hebrew | שמונה עשר אלף תשע מאות תשעים ושמונה |
| Hindi | अठारह हज़ार नौ सौ अट्ठानबे |
| Hungarian | tizennyolcezerkilencszázkilencvennyolc |
| Icelandic | átján þúsund og níuhundrað og níutíu og átta |
| Indonesian | delapan belas ribu sembilan ratus sembilan puluh delapan |
| Italian | diciottomilanovecentonovantotto |
| Japanese | 一万八千九百九十八 |
| Korean | 만 팔천구백구십팔 |
| Latvian | astoņpadsmit tūkstoši deviņsimt deviņdesmit astoņi |
| Lithuanian | aštuoniolika tūkstančių devyni šimtai devyniasdešimt aštuoni |
| Norwegian | atten tusen ni hundre og nittiåtte |
| Persian | هجده هزار و نهصد و نود و هشت |
| Polish | osiemnaście tysięcy dziewięćset dziewięćdziesiąt osiem |
| Portuguese | dezoito mil novecentos e noventa e oito |
| Romanian | optsprezece mii nouă sute nouăzeci şi opt |
| Russian | восемнадцать тысяч девятьсот девяносто восемь |
| Serbian | осамнаест хиљада деветсто деведесет и осам |
| Slovak | osemnásť tisíc deväťsto deväťdesiatosem |
| Slovene | asemnajst tisuću devetsto devetdeset osem |
| Spanish | dieciocho mil novecientos noventa y ocho |
| Swahili | elfu kumi na nane, mia tisa na tisini na nane |
| Swedish | artontusenniohundranittioåtta |
| Thai | หนึ่งหมื่นแปดพันเก้าร้อยเก้าสิบแปด |
| Turkish | on sekiz bin dokuz yüz doksan sekiz |
| Ukrainian | вісімнадцять тисяч девʼятсот девʼяносто вісім |
| Vietnamese | mười tám nghìn chín trăm chín mươi tám |
| Number 18998 reversed | 89981 | |
| Unicode Character | U+4A36 | 䨶 |
| Unix Timestamp | Thu, 01 Jan 1970 05:16:38 +0000 | |