Number
-19
- Negative
- Odd
- 2 digits
-19 is an odd 2-digit integer and the negative of 19. It has 2 divisors and a digital root of 1.
Number properties
ParityOddnot divisible by 2
SignNegative
Absolute value19
Digit count2
Digit sum10
Digital root1repeated digit sum
PalindromicNoreads differently backwards
Factors & divisors
Prime factorisation−1 × 19
Distinct prime factors119
Number of divisors2
Sum of divisors σ(n)20
SquarefreeYesno repeated prime factor
All divisors1, 192 in total
Arithmetic
Representations
Decimal-19
Binary100115 bits
Octal23
Hexadecimal13
Base 36J
In wordsminus nineteen
Ordinalminus nineteenth
Scientific notation-1.9 × 10^1
Engineering notation-19
Powers & multiples
-19 to the power 2361
-19 to the power 3-6,859
-19 to the power 4130,321
-19 to the power 5-2,476,099
First ten multiples-19, -38, -57, -76, -95, -114, -133, -152, -171, -190
Powers of twoBetween 2^4 (16) and 2^5 (32)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3No, remainder 1
Divisible by 4No, remainder 3
Divisible by 5No, remainder 4
Divisible by 6No, remainder 1
Divisible by 7No, remainder 5
Divisible by 8No, remainder 3
Divisible by 9No, remainder 1
Divisible by 10No, remainder 9
Divisible by 11No, remainder 8
Divisible by 12No, remainder 7
Divisible by 100No, remainder 19
As a percentage & fraction
As a percentage-1,900%
-19% as a decimal-0.19
-19% of 100-19
-19% of 1,000-190
As a fraction of 100-19/100
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