Properties of the Number 20830

Twenty Thousand Eight Hundred Thirty

Basics

Value: 20829 → 20830 → 20831

Parity: even

Prime: No

Previous Prime: 20809

Next Prime: 20849

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 × 5 × 2083

Divisors: 1, 2, 5, 10, 2083, 4166, 10415, 20830

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000101011110

Octal: 50536

Duodecimal: 1007A

Hexadecimal: 515e

Square: 433888900

Square Root: 144.32601983010548

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

Twice-partitioned numbers where the first partition is constant. A279787

Smallest composite that when added to sum of prime factors reaches a prime after n iterations. A50710

Number of integer partitions of n of whose permutations do not all have distinct runs. A351203

Numerators of continued fraction convergents to sqrt(7). A41008

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

First differences of A307632. A348773

a(n) = A348773(2·n). A348775

Nonnegative integers k such that k! mod nextprime(k) is larger than k. A360805

x-values in the solution to x² - 7·y² = -3. A202637

Numerators of the other-side convergents to sqrt(7). A259597