Properties of the Number 20189

Twenty Thousand One Hundred Eighty-Nine

Basics

Value: 20188 → 20189 → 20190

Parity: odd

Prime: No

Previous Prime: 20183

Next Prime: 20201

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 13 × 1553

Divisors: 1, 13, 1553, 20189

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100111011011101

Octal: 47335

Duodecimal: B825

Hexadecimal: 4edd

Square: 407595721

Square Root: 142.08800090085018

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

Expansion of ∏_k>=1 1/(1-x^3·k-2)^3·k-2. A262947

a(n) is the number of 4 element sets of distinct integer sided trapezoids whose base angles are 60 degrees that fill an equilateral triangular grid of side n units. A389392

a(n) = (15·n⁴ + 22·n³ + 45·n² + 14·n) / 24. A101166

Expansion of ∏_k>0 (1+k²*x^k)^-1/k. A303354

a(1) = 7; a(n+1) = a(n)-th nonprime, where nonprimes begin at 0. A25002

Numbers k such that 413·2^k+1 is prime. A323106

Pseudoprimes to base 61. A20189