Properties of the Number 20284

Twenty Thousand Two Hundred Eighty-Four

Basics

Value: 20283 → 20284 → 20285

Parity: even

Prime: No

Previous Prime: 20269

Next Prime: 20287

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 11 × 461

Divisors: 1, 2, 4, 11, 22, 44, 461, 922, 1844, 5071

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100111100111100

Octal: 47474

Duodecimal: B8A4

Hexadecimal: 4f3c

Square: 411440656

Square Root: 142.42190842703943

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

Self-convolution of Fibonacci numbers. A1629

Euler transform of negative integers. A73592

Numbers n such that Bernoulli number B_n has denominator 690. A272186

Bisection of Fibonacci triangle A037027: even-indexed members of column sequences of A037027 (not counting leading zeros). A60920

Even-indexed terms of A001629(n), n >= 2, (Fibonacci convolution). A54444

Total sum of the sums of all positive k-th ranks of all partitions of n. A208483

Triangle of coefficients of polynomials v(n,x) jointly generated with A209830; see the Formula section. A209831

Triangle of coefficients of polynomials u(n,x) jointly generated with A210804; see the Formula section. A210803

G.f.: ∑_k>=0 x^k² * ∏_j=1..k ((1 + x^j)/(1 - x^j))². A376854

The smallest k >= 0 that can be represented as a linear combination of 1², 2², ..., n² with coefficients +-1 and that cannot be represented using 1², 2², ..., m² with 1<=m<n. A392127