Properties of the Number -20542

Twenty Thousand Five Hundred Forty-Two

Basics

Value: -20543 → -20542 → -20541

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 × 10271

Divisors: 1, 2, 10271, 20542

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: -101000000111110

Octal: -50076

Duodecimal: -BA7A

Hexadecimal: -503e

Square: 421973764

Square Root: 143.32480594788888

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·such that 0 < |x⁷ - y²| < x^5/2 for some number y. A173348

a(n) = p(n)*p(n+2) - 3·p(n+1), where p(n) is the n-th prime. A152528

a(0)=2, a(n) = n²+a(n-1). A153056

a(n) = A056520(n)+1 for n>0, a(0)=1. A179904

Triangle of coefficients of polynomials v(n,x) jointly generated with A208761; see the Formula section. A208762

Number of powerful numbers between 2^n-1+1 and 2ⁿ. A62761

a(n) = 36·n² - 8·n - 2 (n >=1). A304834

Number of inverse pairs of elements in symmetric group S_n, or pairs of total orders on n nodes (average of A000085 and A000142). A7868

a(n) = (concatenation of the first n terms of A099552)/n. A83161

Diagonal of array A085205. A85228