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20
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21
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22
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23
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24
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26
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URI: http://km.aifb.kit.edu/projects/numbers/n23 
[URI4URI]    External links
    Wikipedia: 
23_(number)
    Wikidata: 
Q48240
    Names
    Estonian: 
kakskümmend kolm
    Czech: 
dvacet tøi
    Portuguese: 
vinte e três
    Lithuanian: 
dvideðimt trys
    French: 
vingt-trois
    Italian: 
ventitre
    Spanish: 
veintitres
    German: 
dreiundzwanzig
    English: 
twenty-three
    Other systems
    Roman: 
XXIII
    Binary: 
10111
    Octal: 
27
    Duodecimal: 
1b
    Hexadecimal: 
17
    Hexatridecimal: 
n
    Properties
    Natural logarithm: 
3.1354942159291
    Binary logarithm: 
4.523561956057
    Common logarithm: 
1.3617278360176
    Prime factors: 
    1
    * 
    23
    Digit sum: 
    5
    
      Semantic forms
    Graphite