Properties of the Number 20770

Twenty Thousand Seven Hundred Seventy

Basics

Value: 20769 → 20770 → 20771

Parity: even

Prime: No

Previous Prime: 20759

Next Prime: 20771

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 × 5 × 31 × 67

Divisors: 1, 2, 5, 10, 31, 62, 67, 134, 155, 310

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000100100010

Octal: 50442

Duodecimal: 1002A

Hexadecimal: 5122

Square: 431392900

Square Root: 144.11800720243116

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

Centered 23-gonal numbers. A69174

Consecutive states of the linear congruential pseudo-random number generator (419·s + 6173) mod 29282 when started at s=1. A385036

Self-convolution of sequence A001402. A160647

Those terms of A255571 whose every A080541/A080542-rotation is also a term of A255571. A258001

Let p(n, s, x) be predicate that number of occurrences of s's in x >= 2·n - the length of the longest sequence of s's in x. Then a(n)=#{x in {0,1}* | x ends in 0 and p(n,0,x) and (there is no prefix y of·such that p(n,0,y) or p(n,1,y))}. A530

Odd numbers k such that the ring of integers of Q(5^1/k) is not Z[5^1/k]. A342391

Decimal expansion of 1/sqrt(13). A20770

Number of (n+2)X(1+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the diagonal and antidiagonal minus the sum of the medians of the central row and column nondecreasing horizontally and vertically. A254991