Properties of the Number 20105

Twenty Thousand One Hundred Five

Basics

Value: 20104 → 20105 → 20106

Parity: odd

Prime: No

Previous Prime: 20101

Next Prime: 20107

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 5 × 4021

Divisors: 1, 5, 4021, 20105

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 100111010001001

Octal: 47211

Duodecimal: B775

Hexadecimal: 4e89

Square: 404211025

Square Root: 141.79210133149166

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

Indices of maximal gaps between consecutive nontrivial zeros of the Riemann ζ function. A208436

Numbers k such that (10^k - 1) - 4·10^floor(k/2) is a palindromic wing prime (a.k.a. near-repdigit palindromic prime). A77786

Expansion of 1/(1 - x/(1 - 49·x⁷)^1/7). A373511

Number of (n+3)X(2+3) 0..1 arrays with each row and column divisible by 15, read as a binary number with top and left being the most significant bits. A262451

Number of reduced Latin squares of order n; also number of labeled loops (quasigroups with an identity element) with a fixed identity element. A315

Number of n X n Latin squares up to row and column permutation (or "RC-equivalence"). A123234

Ceiling of γ(n+9/10)/γ(9/10). A20105