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Properties of the Number 20055

Twenty Thousand Fifty-Five

Basics

Value: 20054 → 20055 → 20056

Parity: odd

Prime: No

Previous Prime: 20051

Next Prime: 20063

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 7 × 191

Divisors: 1, 3, 5, 7, 15, 21, 35, 105, 191, 573

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100111001010111

Octal: 47127

Duodecimal: B733

Hexadecimal: 4e57

Square: 402203025

Square Root: 141.6156770982648

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

Triangle read by rows, Bell transform of Bell numbers. A264428
Indices of primes followed by a gap (distance to next larger prime) of 44. A320720
Irregular triangle read by rows where T(n,k) is the number of simple graphs covering n vertices with exactly k triangles, 0 <= k <= binomial(n,3). A372167
Numbers k such that 2k+1, 4k+1, 6k+1 and 8k+1 are primes. A124409
Triangle T(n, k) = Number of non-equivalent (mod D3) ways to arrange k indistinguishable points on a triangular grid of side n so that no three points are collinear. Triangle read by rows. A234350
Number of nonequivalent ways to place 3 points on an n X n square grid so that no more than 2 points are on a vertical or horizontal straight line. A279447
Sums of terms of groups in A075626. A75629
Number of non-equivalent (mod D3) ways to arrange 4 indistinguishable points on a triangular grid of side n so that no three points are collinear. A234352
Odd numbers with exactly 4 distinct palindromic prime factors. A46406
Triangle of coefficients of polynomials u(n,x) jointly generated with A210599; see the Formula section. A210598