Properties of the Number 20814

Twenty Thousand Eight Hundred Fourteen

Basics

Value: 20813 → 20814 → 20815

Parity: even

Prime: No

Previous Prime: 20809

Next Prime: 20849

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 3469

Divisors: 1, 2, 3, 6, 3469, 6938, 10407, 20814

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000101001110

Octal: 50516

Duodecimal: 10066

Hexadecimal: 514e

Square: 433222596

Square Root: 144.27057912131636

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

Volume of right circular cone (rounded down) with the diameter of base and height equal to n. A228189

Consecutive states of the linear congruential pseudo-random number generator (25173·s+13849) mod 2¹⁶ when started at s=1. A383940

Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of the symmetric matrix A115263 based on (1,2,3,4,...); by antidiagonals. A202673

a(n) = n! * ∑_k=1..n H(k)*(n+1-k)!, where H(k) = ∑_j=1..k 1/j. A109779

Numbers n such that 3·4ⁿ - 1 is prime. A272057

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 878", based on the 5-celled von Neumann neighborhood. A273741

Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 96. A31594

Number of partitions of n into parts not of the form 15k, 15k+4 or 15k-4. Also number of partitions with at most 3 parts of size 1 and differences between parts at distance 6 are greater than 1. A35958

Decimal expansion of 1/sqrt(57). A20814

Number of (n+4) X 9 0..1 matrices with each 5 X 5 subblock idempotent. A224687