Properties of the Number -20150

Twenty Thousand One Hundred Fifty

Basics

Value: -20151 → -20150 → -20149

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 2 × 5 ² × 13 × 31

Divisors: 1, 2, 5, 10, 13, 25, 26, 31, 50, 62

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -100111010110110

Octal: -47266

Duodecimal: -B7B2

Hexadecimal: -4eb6

Square: 406022500

Square Root: 141.9506956657839

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 k such that k and k+1 have the same sum of non-unitary divisors (A048146), for A048146(k) > 0. A64115

a(n) = n*(n+1)*(n+2)*(n+7)/24. A5582

Numbers k such that the sum of the squares of the divisors of k is divisible by k. A46762

Two-column table read by rows: Primitive distinct pairs that have the same value of φ, σ, and τ. A322688

Row sums in A083167. A83170

Number of regions in a polygon whose boundary consists of n+2 equally spaced points around a semicircle and three equally spaced points along the diameter (a total of n+3 points). See Comments for precise definition. A333642

a(n) = 4394·n - 1820. A156627

Numbers k such that k and k+1 have the same positive sum of noninfinitary divisors (A348271). A348346

a(n) = a(n-1) + a(n-2) + 1, with a(0) = 0 and a(1) = 11. A22316

a(n) = n*(n + 1)*(7·n + 11)/6. A255687