Properties of the Number 20488

Twenty Thousand Four Hundred Eighty-Eight

Basics

Value: 20487 → 20488 → 20489

Parity: even

Prime: No

Previous Prime: 20483

Next Prime: 20507

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ³ × 13 × 197

Divisors: 1, 2, 4, 8, 13, 26, 52, 104, 197, 394

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 101000000001000

Octal: 50010

Duodecimal: BA34

Hexadecimal: 5008

Square: 419758144

Square Root: 143.13629868066312

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 n such that Bernoulli number B_n has denominator 1590. A272140

Triangular array: the fission of ((x+1)ⁿ) by ((2x+1)ⁿ). A193858

Number of binary words of length n such that there is at least one 0 and every run of consecutive 0's is of length >= 4. A209231

Mirror of the triangle A193858. A193859

Number of nondecreasing arrangements of n numbers in -3..3 with sum zero and sum of squares less than n·12/3. A183929

Number of strict 3rd-order maximal independent sets in path graph. A7384

Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 71. A31569

Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 6 ones in any 5 X 5 X 5 subtriangle. A153952

Partial sums of A073602. A259035

Numbers n such that τ(n) (or sigma₀(n)) = φ(n). A20488