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# The Number 20: Properties and Meanings

Prime Factors of**20**=2x2x5.

**20**can be Partitioned in 627 ways.

**20**can be Partitioned 11 times with each term no larger than 2

**20**can be Partitioned 44 times with each term no larger than 3

**20**can be Partitioned 108 times with each term no larger than 4

**20**can be Partitioned 192 times with each term no larger than 5

**20**can be Partitioned 282 times with each term no larger than 6

**20**can be Partitioned 364 times with each term no larger than 7

**20**can be Partitioned 434 times with each term no larger than 8

**20**can be Partitioned 488 times with each term no larger than 9

**20**can be Partitioned 530 times with each term no larger than 10

**20**can be Partitioned 560 times with each term no larger than 11

**20**can be Partitioned 582 times with each term no larger than 12

**20**can be Partitioned 597 times with each term no larger than 13

**20**can be Partitioned 608 times with each term no larger than 14

**20**can be Partitioned 615 times with each term no larger than 15

**20**can be Partitioned 620 times with each term no larger than 16

**20**can be Partitioned 623 times with each term no larger than 17

**20**can be Partitioned 625 times with each term no larger than 18

**20**can be Partitioned 626 times with each term no larger than 19

**20**is the number of rooted trees with 6 vertices.

**20**is an Abundant Number.

**20**= 2 + 4 + 6 + 8

**20**=1 + 3 + 6 + 10.

**20**is a Tetrahedral Number.

**20**is the total number of parts in all Partitions of 5.

The Dodecahedron is a Platonic Solid with

**20**Vertices.

The Icosahedron is a Platonic Solid with

**20**Faces.

The Chemical Element Calcium has an atomic number of

**20**.

Number of characters of the alphabet of bards.

Mathematical base (vigesimal numeration) in which worked the Gallic and the Mayas.

One month in the religious Mayan calendar contained

**twenty**days.

In Humans: the

**20**amino acids.

**20**Massalia is a large and fairly bright Main belt asteroid.

### The Year 20 AD

In the year**20**AD Hillel the Elder, Talmudic scholar, died.

In the year

**20**AD Tiberias was built on the Sea of Galilee by Herod Antipas, in honour of Tiberius.

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