Properties of the Number 20572

Twenty Thousand Five Hundred Seventy-Two

Basics

Value: 20571 → 20572 → 20573

Parity: even

Prime: No

Previous Prime: 20563

Next Prime: 20593

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 37 × 139

Divisors: 1, 2, 4, 37, 74, 139, 148, 278, 556, 5143

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000001011100

Octal: 50134

Duodecimal: BAA4

Hexadecimal: 505c

Square: 423207184

Square Root: 143.42942515397598

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Number of generalizations of the partition 1ⁿ. A213242

a(n) is the number of terms in the analog of A121805 but starting with n, or -1 if that sequence is infinite. A330128

Number of returns to the x-axis (i.e., d or u steps hitting the x-axis) in all Grand Motzkin paths of length n. (A Grand Motzkin path of length n is a path in the half-plane x>=0, starting at (0,0), ending at (n,0) and consisting of steps u=(1,1), d=(1,-1) and h=(1,0).). A109194

a(n) = n + floor( n²/2 + n³/3 ). A236773

Number of isoscent sequences of length n with maximal number of ascents. A243237

Coordination sequence for MgZn2, Position Zn1. A9937

a(n) = prime(n)*prime(n+1) - prime(n). A37166

Number of length 3+4 0..n arrays with every five consecutive terms having four times some element equal to the sum of the remaining four. A249659

Number of (4+1) X (n+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically. A258557

T(n,k)=Number of length n+4 0..k arrays with every five consecutive terms having four times some element equal to the sum of the remaining four. A249656