Properties of the Number -20870

Twenty Thousand Eight Hundred Seventy

Basics

Value: -20871 → -20870 → -20869

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 × 5 × 2087

Divisors: 1, 2, 5, 10, 2087, 4174, 10435, 20870

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101000110000110

Octal: -50606

Duodecimal: -100B2

Hexadecimal: -5186

Square: 435556900

Square Root: 144.46452851824907

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

Expansion of e.g.f.: log(1 + exp(x)*x). A9306

a(n) = (1/2+1/2·i*sqrt(11))ⁿ + (1/2-1/2·i*sqrt(11))ⁿ, where i=sqrt(-1). A131040

Number of planar partitions of n where parts strictly decrease along each row and column. A114736

Number of square plane partitions of n. A89299

Number of meaningful differential operations of the n-th order on the space R¹⁰. A90995

a(n) = smallest positive integer that cannot be obtained using the number n at most n times and the operations +, -, *, /, where intermediate subexpressions must be integers. A71848

Number of length n 1..(1+1) arrays with every leading partial sum divisible by 2, 3, 5, 7 or 11. A254940