Number
-23
- Negative
- Odd
- 2 digits
-23 is an odd 2-digit integer and the negative of 23. It has 2 divisors and a digital root of 5.
Number properties
ParityOddnot divisible by 2
SignNegative
Absolute value23
Digit count2
Digit sum5
Digital root5repeated digit sum
PalindromicNoreads differently backwards
Factors & divisors
Prime factorisation−1 × 23
Distinct prime factors123
Number of divisors2
Sum of divisors σ(n)24
SquarefreeYesno repeated prime factor
All divisors1, 232 in total
Arithmetic
Representations
Decimal-23
Binary101115 bits
Octal27
Hexadecimal17
Base 36N
In wordsminus twenty-three
Ordinalminus twenty-third
Scientific notation-2.3 × 10^1
Engineering notation-23
Powers & multiples
-23 to the power 2529
-23 to the power 3-12,167
-23 to the power 4279,841
-23 to the power 5-6,436,343
First ten multiples-23, -46, -69, -92, -115, -138, -161, -184, -207, -230
Powers of twoBetween 2^4 (16) and 2^5 (32)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3No, remainder 2
Divisible by 4No, remainder 3
Divisible by 5No, remainder 3
Divisible by 6No, remainder 5
Divisible by 7No, remainder 2
Divisible by 8No, remainder 7
Divisible by 9No, remainder 5
Divisible by 10No, remainder 3
Divisible by 11No, remainder 1
Divisible by 12No, remainder 11
Divisible by 100No, remainder 23
As a percentage & fraction
As a percentage-2,300%
-23% as a decimal-0.23
-23% of 100-23
-23% of 1,000-230
As a fraction of 100-23/100
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