XVIII Roman Numeral

XVIII is roman numeral 18. Hexadecimal, fibonacci sequence, prime numbers, square root, roman numeral converting for XVIII roots and more.

Read and Write Roman Numeral XVIII

Roman numeral symbols are written and read from left to right, from highest to lowest values. If XVIII is text, it is the number 18.

Miscellaneous & Conversions For 18

Written EnglishEightteen
Roman Numeral 18XVIII
RGB Colour (# 012 or #000012)
 
 
Decimal / Number18
Binary10010
Ternary200
Hexadecimal (Hex)0x12
Quaternary102
Quinary33
Senary (Heximal)30
Octal22
Duodecimal (Dozenal)16

Mathematics

Prime Factors: 2 x 3 x 3 = 18
Factorial: 18!6402373705728000
Harshad Number: 18 True
Triangular Number Of 18 171
Square Root: √18 4.24264068712
Cube Root (Root 3): 3√18 2.62074139421
Tesseract Root (Root 4): 4√18 2.05976714391
Quintal / nth Root. (Root 5) 5√18 1.78260245797
¾ Root8.73885189073
Fibonnaci # 18 2584
Recipricol 1/ 18 0.0555555555556
Quarter 1/44.50 or 4.50/18
Half 1/29 or 9/18
Third 1/36 or 6/18

Roman Numeral Chart. Read & Write 18

Reading and writing roman numerals isn't common knowledge. However, this roman numeral chart should help you read and write numbers in roman numerals from 1 to 1,000,000. Using an overline symbol is times 1,000. ( Example: X means to add 3 zeros to your number. So X which is 5, but written as X with the overline is 5,000.

  • When a symbol appears after a larger symbol it is added: Example: VI = V + I = 5 + 1 = 6
  • When a symbol appears before a larger symbol it is subtracted: Example: IX = X - I = 10 - 1 = 9
  • Do not use the same symbol more than 3 times. But, IIII is sometimes used for 4
1 I 10 x 500 D 1,001 MI
2 II 20 XX 501 DI 1,002 MII
3 III 30 XXX 530 DXXX 1,030 MXXX
4 IV 40 XL 550 DL 1,550 MDL
5 V 50 L 600 DC 1,555 MDLV
6 VI 60 LX 650 DCL 5,000 V
7 VII 70 LXX 700 DCC 10,000 X
8 VIII 80 LXXX 800 DCCC 50,000 L
9 IX 90 XC 890 DCCCXC 100,000 C
10 X 95 XCV 900 CM 500,000 D
11 XI 99 XCIX 950 CML 1,000,000 M
12 XII... 100 C 1000 M    
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