Properties of the Number 16820

Sixteen Thousand Eight Hundred Twenty

Basics

Value: 16819 → 16820 → 16821

Parity: even

Prime: No

Previous Prime: 16811

Next Prime: 16823

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 5 × 29 ²

Divisors: 1, 2, 4, 5, 10, 20, 29, 58, 116, 145

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100000110110100

Octal: 40664

Duodecimal: 9898

Hexadecimal: 41b4

Square: 282912400

Square Root: 129.6919426949878

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

Sum of consecutive nonsquares. A48395

Sum of the n-th maximal run of adjacent (increasing by one at a time) non-perfect-powers. A375705

a(n) = 20·n². A195322

Composites whose prime factorization in base 3 is an anagram of the number in base 3. A260047

Row sums of the triangle in A199332. A199771

Expansion of g.f.: 1/((1 - x - x² + x⁴ - x⁶)*(1 - x² + x⁴ + x⁵ - x⁶)). A147606

Number of 0..n arrays x(0..2) of 3 elements with each no smaller than the sum of its previous elements modulo (n+1). A200252

Total number of parts in all partitions of n with at least one distinct part. A220477

Number of Hamiltonian paths in C₅ X P_n. A3732

Number of triples (w,x,y) with all terms in {0,...,n} and w >= floor((x+y)/3). A212972