Ten

The ten (10) is the even natural number that follows 9 and precedes 11.

Math

• 10 is a composite number, which has the following factors: 1, 2 and 5. As the sum of its factors is 8 ≤ 10, it is a defective number. The sum of its dividers 1, 2, 5, 10 = 18
• Free number of squares.
• 10² = 100
• 10³ =1000
• 10⁶ = 1000000
• The 10 is the basis of the decimal numbering system that has been used in various cultures and civilizations, being the number of fingers that add both hands.
• It is understood that increasing an amount in an order of magnitude means multiplying the amount by ten.
• Ten is also a triangular number and a tetrairical number.
• A semi-press number.
• It's a Harshad number.
• A polygon with ten sides is a decagone. Because 10 the product of different cousins of Fermat, a regular decay is a polygon built using rule and compass.
• A Perrin number.
• Størmer number.
• Happy number.

Chemistry

• Atomic neon (Ne).
• The number of hydrogen atoms in the butane, a hydrocarbon.

Physics

• The number of time-space dimensions in some overlapping theories.
• The metric system is based on number 10, so the conversion of units is performed by adding or removing zeros (e.g., 1 centimeter = 10 millimeters, 1 decimeter = 10 centimeters, 1 metre = 100 centimeters, 1 decameter = 10 meters, 1 kilometer = 1,000 meters).

Astronomy

• Object of Messier M10 is a globular cluster of Ofiuco constellation.
• (10) Hygiea is an asteroid belonging to the asteroid belt.