20181921 (number)

20181921 is an odd 8-digits composite number following 20181920 and preceding 20181922. In scientific notation, it is written as 2.0181921 × 10^7. The sum of its digits is 24. It has a total of 4 prime factors and 16 positive divisors. There are 13003200 positive integers (up to 20181921) that are relatively prime to 20181921.

Interesting facts

Basic properties

Name

Name twenty million one hundred eighty-one thousand nine hundred twenty-one

Notation

Scientific notation 2.0181921 × 10^7
Engineering notation 2.0181921 × 10^6

Prime Factorization of 20181921

Prime Factorization 3 × 101 × 43 × 1549

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 20181921
Product of the distinct prime numbers

The prime factorization of 20181921 is 3 × 101 × 43 × 1549. Since it has a total of 4 prime factors.

Most popular turbo-numbers

1, 1, 10, 78, 954, 803, 2902, 5107, 95837, 18025, 195198, 341436, 6503494, 4145430, 70478196, 33287272, 652691801, 658157529, 7344523860, 308211639

Basic calculations (n = 20181921)

Multiplication

n×y
n×2 40363842
n×3 60545763
n×4 80727684
n×5 100909605

Division

n÷y
n÷2 10090960.5
n÷3 6727307
n÷3 5045480.25
n÷5 4036384.2

Exponentiation

ny
n2 407309935250241
n3 8.2202969357355E+21
n4 1.6590138335356E+29
n5 3.3482086126322E+36

Nth Root

y√n
2√n 4492.429298275
3√n 272.26229474099
4√n 67.025586892433
5√n 28.906299649743

Divisors of 20181921

1, 3, 43, 101, 129, 303, 1549, 4343, 4647, 13029, 66607, 156449, 199821, 469347, 6727307, 20181921

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -20181920
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
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 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 20181921 can be divided by 16 positive divisors. The sum of these divisors (counting 20181921) is 1, the average is 0.0625.

Base conversion 20181921

Base System Value
2 Binary 1001100111111001110100001
3 Ternary 1101222100101120
4 Quaternary 1030333032201
5 Quinary 20131310141
6 Senary 2000322453
8 Octal 114771641
10 Decimal 20181921
12 Duodecimal 6913429
16 Hexadecimal 133f3a1
20 Vigesimal 662eg1
36 Base36 c0kgx

Cryptographic Hash Functions

md5 e9b0a25e87261b51b8109ba9d6119f9f
sha1 3add578ae4c43aa216432ca7caf257158b4969d7
sha256 feed9b80b061e9ede1f2c3636ffc1d2fb135c7b9005f63c690f7a6b27935382a
sha512 21fb189b7edaeea1a5cc911002d268540c4b4f752a212d1d4836d69070a0032d6e58361fa94d8f0e298633fce7c5ff7f2f837f610de14f58f3fccbd5f8f7d994
ripemd-160 c4d1274dbb02a099090a8c62c78a60d0ace1dde2

20181921 as geometric shapes

Circle

Radius = n
Diameter 40363842
Circumference 126806749.49786
Area 1.2796019003163E+15

Sphere

Radius = n
Volume 3.4433099284844E+22
Surface area 5.1184076012652E+15
Circumference 126806749.49786

Square

Length = n
Perimeter 80727684
Area 407309935250241
Diagonal 28541546.392942

Cube

Length = n
Surface area 2443859611501446
Volume 8.2202969357355E+21
Space diagonal 34956112.566341

Equilateral Triangle

Length = n
Perimeter 60545763
Area 1.7637037557025E+14
Altitude 17478056.283171

Triangular Pyramid

Length = n
Surface area 1.7637037557025E+14
Volume 9.6877128443759E+20
Height 9513848.7976475