Properties of the Number 20247

Twenty Thousand Two Hundred Forty-Seven

Basics

Value: 20246 → 20247 → 20248

Parity: odd

Prime: No

Previous Prime: 20233

Next Prime: 20249

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 17 × 397

Divisors: 1, 3, 17, 51, 397, 1191, 6749, 20247

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111100010111

Octal: 47427

Duodecimal: B873

Hexadecimal: 4f17

Square: 409941009

Square Root: 142.2919533916096

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

T(n,k)=Number of (n+2)X(k+2) binary arrays avoiding patterns 001 and 111 in rows and columns. A202378

Prime time numbers on 6-digit clocks: numbers of the form HMMSS where H, MM, SS are primes, H < 24, MM and SS < 60. A295014

a(n) = n*(4·n² + 2·n + 1). A110451

Numbers m such that m·reversal(m) contains every decimal digit exactly once. A178929

T(n,k) = Number of n X k toroidal 0..2 arrays with each element having the sum of its vertical neighbors equal to the sum of its horizontal neighbors. A184099

Number of (n+1) X 7 0..2 arrays with every 2 X 2 subblock summing to 4. A183629

Number of (n+2)X5 binary arrays avoiding patterns 001 and 111 in rows and columns. A202373

Number of (n+2)X6 binary arrays avoiding patterns 001 and 111 in rows and columns. A202374

Number of (n+1) X 8 0..1 matrices with each 2 X 2 subblock idempotent. A224549

The hyper-Wiener index of the hexagonal triangle T_n, defined in the He et al. reference. A248094