Complete Number Analysis
18
Number Visualizations
Binary Visual
10010
2 ones, 3 zeros
Mathematical Properties
Basic Properties
Parity:
Even
Prime:
No
Square:
324
Cube:
5,832
Square root:
4.2426
Cube root:
2.6207
Factorial:
6,402,373,705,728,000
Divisors and Factors
Prime factors:
2 × 3 × 3
Number of divisors:
6
Sum of divisors:
21
Type:
Abundant
Divisors:
1, 2, 3, 6, 9, 18
Conversions
Binary:
10010
Octal:
22
Hexadecimal:
12
Roman:
XVIII
Base64:
MTg=
Geometry and Measures
Circle (radius 18)
Area:
1,017.88 u²
Perimeter:
113.10 u
Diameter:
36 u
Square (side 18)
Area:
324 u²
Perimeter:
72 u
Diagonal:
25.46 u
3D Volumes
Cubo:
5,832 u³
Sphere:
24,429.02 u³
Cylinder:
18,321.77 u³
More Measures
Eq. triangle:
140.30 u²
Hexagon:
841.78 u²
Cube surf.:
1,944 u²
Numerology and Symbolism
Numerological Analysis
Sum of digits:
9
Numerological reduction:
9
Product of digits:
8
Unique Digits:
2
Meanings:
Compassion
Service
Humanitarianism
Number Curiosities
General fact: 18 is the number of wheels on the most common type of North American tractor-trailer truck, which are hence often called 18-wheelers.
Mathematical fact: 18 is a composite number, its proper divisors being 1, 2, 3, 6 and 9.
Trivia: 18 is the number of chapters into which James Joyce's epic novel Ulysses is divided.
Historical date: January 18th is the day in 1990 that Washington, D.C. Mayor Marion Barry is arrested for drug possession in an FBI sting.
More Interesting Properties
In the calendar
Day of the year:
18 January
Weeks:
2.6 weeks
Months:
0.6 months
Years:
0.05 years
In time
Seconds:
00:00:18
Minutes:
0.3 min
Hours:
0.01 h
Days:
0 days
Representations
Percentage:
18%
Angle:
18°
Temperature:
18°C = 64.4°F
Frequency:
18 Hz
Games
Dice (d6):
3 dados + 0
Chess:
b3
Cards:
5♥
Programmatically generated for number 18
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