Properties of the Number 20846

Twenty Thousand Eight Hundred Forty-Six

Basics

Value: 20845 → 20846 → 20847

Parity: even

Prime: No

Previous Prime: 20809

Next Prime: 20849

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 7 × 1489

Divisors: 1, 2, 7, 14, 1489, 2978, 10423, 20846

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101000101101110

Octal: 50556

Duodecimal: 10092

Hexadecimal: 516e

Square: 434555716

Square Root: 144.38143925034132

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

List of codewords in binary lexicode with Hamming distance 6 written as decimal numbers. A75934

Relative of Hofstadter Q-sequence: a(n) = max(0, n+20830) for n <= 0; a(n) = a(n-a(n-1)) + a(n-a(n-2)) + a(n-a(n-3)) for n > 0. A283887

Numbers k such that k!6 + 9 is prime, where k!6 is the sextuple factorial number (A085158 ). A288154

a(0) = a(1) = 1. a(n) = ∑_p∣n a(n-p), where the sum is over all distinct primes p that divide n. A134192

A digitized pure tuning tone, sampled at standard settings for consumer audio: a(n) = floor(sin(2*π*(440/44100)*n)*32767). A320277

a(n) is the least positive k such that (2n+1) + 2^k is prime, or 0 if no such k exists. A67760

Decimal expansion of 1/sqrt(89). A20846