820

Properties by base:

More about this number at Positiv Integers and Number Empire.

The number is not a prime.

Its 4 (3 unique) factors are:
2² = 4
5
41

Its 12 divisors are:
1
2
4
5
10
20
41
82
164
205
410
820
Its aliquote sum is:
944
makeing it a abundant number.

As Unicode codepoint (since version 1.1) this number represents this character:̴ COMBINING TILDE OVERLAY in Diacriticals (Source: https://ucdapi.org/unicode/latest/codepoint/dec/820); HTML: ̴

In the work of Johann Sebastian Bach BWV 820 is Ouvertüre in F

The number appears at position 52 of the decimal digits of π surrounded by
0288419716939937510582097494459230781640628 Source: The Pi-Search Page

Computations done with Math::BigInt 1.999811 and Math::Pari 2.030523 based on PARI/GP 2.11.3 (elapsed: 878.375ms; cpu: 88.9760000000006ms)