Properties of the Number 20273

Twenty Thousand Two Hundred Seventy-Three

Basics

Value: 20272 → 20273 → 20274

Parity: odd

Prime: No

Previous Prime: 20269

Next Prime: 20287

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 11 × 19 × 97

Divisors: 1, 11, 19, 97, 209, 1067, 1843, 20273

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100111100110001

Octal: 47461

Duodecimal: B895

Hexadecimal: 4f31

Square: 410994529

Square Root: 142.38328553590833

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

Numbers n such that φ(n)=2*φ(n-1). A171271

Expansion of (1-x)²/((1+x²)*(1-4·x+x²)). A99488

Numbers k such that 3·k² - 3·k + 1 is both a square (A000290) and a centered hexagonal number (A003215). A1922

Second elementary symmetric function of the first n terms of (1,2,3,5,8,...). A203245

a(n) = ∑_k=1..n binomial(k+2,2) * floor(n/k). A366984

Numbers m such that σ(m)/φ(m) = 49/36. A164650

Geometric mean of φ(n) and σ(n) is an integer, n odd. A15705

Odd k for which k+2^m is composite for all m < k. A33919

a(n) = n³/6 + 3·n²/4 + 7·n/3 + 7/8 + (-1)ⁿ/8. A173154

Number of strictly increasing arrangements of 4 nonzero numbers in -(n+2)..(n+2) with sum zero. A188123