19981 (number)

19981 is an odd 5-digits composite number following 19980 and preceding 19982. In scientific notation, it is written as 1.9981 × 10^4. The sum of its digits is 28. It has a total of 3 prime factors and 8 positive divisors. There are 17472 positive integers (up to 19981) that are relatively prime to 19981.

Interesting facts

Basic properties

Name

Name nineteen thousand nine hundred eighty-one

Notation

Scientific notation 1.9981 × 10^4
Engineering notation 1.9981 × 10^3

Prime Factorization of 19981

Prime Factorization 29 × 13 × 53

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 19981
Product of the distinct prime numbers

The prime factorization of 19981 is 29 × 13 × 53. Since it has a total of 3 prime factors.

Most popular turbo-numbers

7, 3, 85, 43, 889, 212, 3203, 2061, 51993, 7181, 844743, 122364, 4241403, 2840230, 62870719, 98778523, 944293607, 74129937, 9582103461, 2544190627

Basic calculations (n = 19981)

Multiplication

n×y
n×2 39962
n×3 59943
n×4 79924
n×5 99905

Division

n÷y
n÷2 9990.5
n÷3 6660.3333333333
n÷3 4995.25
n÷5 3996.2

Exponentiation

ny
n2 399240361
n3 7977221653141
n4 159392865851410321
n5 3.184828852577E+21

Nth Root

y√n
2√n 141.35416513142
3√n 27.135577786768
4√n 11.88924577639
5√n 7.2464190318266

Divisors of 19981

1, 13, 29, 53, 377, 689, 1537, 19981

8 divisors

τ Total Divisors 8
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -19980
Sum of the proper positive divisors of n
A Arithmetic Mean 0.125
Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G Geometric Mean 1
Returns the nth root of the product of n divisors
H Harmonic Mean 8
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 19981 can be divided by 8 positive divisors. The sum of these divisors (counting 19981) is 1, the average is 0.125.

Base conversion 19981

Base System Value
2 Binary 100111000001101
3 Ternary 1000102001
4 Quaternary 10320031
5 Quinary 1114411
6 Senary 232301
8 Octal 47015
10 Decimal 19981
12 Duodecimal b691
16 Hexadecimal 4e0d
20 Vigesimal 29j1
36 Base36 ff1

Cryptographic Hash Functions

md5 efbd304f121218045cb7032edcc74b9f
sha1 5fe0d205cf42b9dbdb49eef5cee74c970b96d10d
sha256 a5bad0e16a99ef51291de61b217d1fd46bca19cf9f55cdb439c96224c0f3af9a
sha512 5d1cdf067f871b91823b8858653517b1b9d0a46923456b2ad7cad20a9acb71213b70250edcb9376aafb7e5d457bbdc2dfdd98adc26396b904124d1277834bdea
ripemd-160 43c3d274d31943f5f7d2f4b50242e983e1b800f4

19981 as geometric shapes

Circle

Radius = n
Diameter 39962
Circumference 125544.32562276
Area 1254250585.1341

Sphere

Radius = n
Volume 33414907922087
Surface area 5017002340.5365
Circumference 125544.32562276

Square

Length = n
Perimeter 79924
Area 399240361
Diagonal 28257.401189777

Cube

Length = n
Surface area 2395442166
Volume 7977221653141
Space diagonal 34608.107186034

Equilateral Triangle

Length = n
Perimeter 59943
Area 172876147.42104
Altitude 17304.053593017

Triangular Pyramid

Length = n
Surface area 172876147.42104
Volume 940124587660.69
Height 9419.1337299256