Properties of the Number 20670

Twenty Thousand Six Hundred Seventy

Basics

Value: 20669 → 20670 → 20671

Parity: even

Prime: No

Previous Prime: 20663

Next Prime: 20681

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 5 × 13 × 53

Divisors: 1, 2, 3, 5, 6, 10, 13, 15, 26, 30

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000010111110

Octal: 50276

Duodecimal: BB66

Hexadecimal: 50be

Square: 427248900

Square Root: 143.77065069060515

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

Numbers divisible by prime(d) for each digit d in their base-9 representation, none of which may be zero. A256879

a(n) = n*(n+1)*(2·n+1)*(n²+n+3)/30. A61927

a(n) = ceiling(a(n-1)*4/3), with a(1) = 1. A87192

Numbers n such that n divides the denominator of 2n-th Bernoulli number. A106741

The number of vertices on a concave circular triangle formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts. A340686

Number of odd Motzkin n-paths, i.e., Motzkin n-paths with an odd number of up steps. A343386

Number of labeled graphs on n nodes with degree set {2,4}. A228697

Irregular triangle read by rows: T(n,k) is the number of k-regular graphs on n labeled nodes with loops allowed, n >= 1, 0 <= k <= n + 1. A333158

Numbers m such that each of p=6·m+1, q=6·p+1, r=6·q+1 and s=6·r+1 is prime. A263311

Number of length-4 0..n arrays with no repeated value greater than the previous repeated value. A269436