Properties of the Number 20698

Twenty Thousand Six Hundred Ninety-Eight

Basics

Value: 20697 → 20698 → 20699

Parity: even

Prime: No

Previous Prime: 20693

Next Prime: 20707

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 79 × 131

Divisors: 1, 2, 79, 131, 158, 262, 10349, 20698

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000011011010

Octal: 50332

Duodecimal: BB8A

Hexadecimal: 50da

Square: 428407204

Square Root: 143.8679950510189

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

Number of subsets of [n] whose sum is a triangular number. A284250

Sum of the products of the first n prime pairs. A135232

Number of nondecreasing strings of numbers x(i=1..6) in -n..n with sum x(i)³ equal to 0. A188280

Floor of area of quadrilateral with consecutive prime sides configured as a cyclic quadrilateral. A329950

Number of base 28 circular n-digit numbers with adjacent digits differing by 5 or less. A125391

a(n) = 5·a(n-1) - 2·a(n-2), with a(0)=2, a(1)=9. A20698