Properties of the Number 20319

Twenty Thousand Three Hundred Nineteen

Basics

Value: 20318 → 20319 → 20320

Parity: odd

Prime: No

Previous Prime: 20297

Next Prime: 20323

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 13 × 521

Divisors: 1, 3, 13, 39, 521, 1563, 6773, 20319

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100111101011111

Octal: 47537

Duodecimal: B913

Hexadecimal: 4f5f

Square: 412861761

Square Root: 142.54472982190538

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

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

Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n having k ascents of length 2 starting at an odd level (0<=k<=floor(n/2)-1 for n>=2; k=0 for n=0,1). A114463

Expansion of ∏_k>=1 1/(1 - x^k)^A000593(k). A301799

Number of n-bead two-color bracelets with 00 prohibited. A129526

a(n) = A077702(n+1)/A077702(n). A77703

Number of ways to partition n elements into pie slices each with an odd number of elements allowing the pie to be turned over. A32277

a(n) = A088418(n+1)/A088418(n). A88419

a(n) = a(n-1) + 3·a(n-2) -2·a(n-3) - 2·a(n-4), where a(0) = -2, a(1) = -1, a(2) = 0, a(3) = 1. A295861

Numbers k such that 161·2^k+1 is prime. A32457

Multiplicity of the zero at x=1 of the characteristic polynomial P_n^C0+. A246998