Properties of the Number 20286

Twenty Thousand Two Hundred Eighty-Six

Basics

Value: 20285 → 20286 → 20287

Parity: even

Prime: No

Previous Prime: 20269

Next Prime: 20287

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 7 ² × 23

Divisors: 1, 2, 3, 6, 7, 9, 14, 18, 21, 23

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100111100111110

Octal: 47476

Duodecimal: B8A6

Hexadecimal: 4f3e

Square: 411521796

Square Root: 142.42892964563063

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 partition numbers. A139582

Record (maximal) gaps between prime triples (p, p+2, p+6). A201598

Numbers that have exactly six prime factors counted with multiplicity (A046306) whose digit reversal is different and also has 6 prime factors (with multiplicity). A109026

Consecutive states of the linear congruential pseudo-random number generator 171·s mod 30269 when started at s=1. A385031

Number of (w,x,y,z) with all terms in {1,...,n} and 3w = x + y + z + n + 1. A212251

Product of n and the sum of remainders of n mod k, for k = 1, 2, 3, ..., n. A256532

Numbers n such that n⁶ + 545 is prime. A163592

Triangle read by rows: T(n,k) is number of hex trees with n edges and level of first leaf (in the preorder traversal) equal to k (1 <= k <= n). A126186

(A331763(n) - A331755(n+1))/2. A335687

Irregular triangle read by rows: T(n,k) is the number of n X n tic-tac-toe positions (up to rotation and reflection) with k tokens (i.e., after k plays) which end a game (n > 0, 0 <= k <= n²). A317576