Properties of the Number 20260

Twenty Thousand Two Hundred Sixty

Basics

Value: 20259 → 20260 → 20261

Parity: even

Prime: No

Previous Prime: 20249

Next Prime: 20261

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 5 × 1013

Divisors: 1, 2, 4, 5, 10, 20, 1013, 2026, 4052, 5065

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100111100100100

Octal: 47444

Duodecimal: B884

Hexadecimal: 4f24

Square: 410467600

Square Root: 142.33762678926468

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

Number of partitions of n containing no part i of multiplicity i. A276429

Number of integer partitions of n whose mean is a mode, i.e., partitions whose mean appears at least as many times as each of the other parts. A363724

Triangle T(n,d) read by rows: the number of mixed trees with n>=1 nodes and 0<=d<n arcs. A335362

Triangle, read by rows, equal to P⁶, where triangle P = A135880; also equals Q³ where Q = P² = A135885. A135893

Coordination sequence for A₄ lattice. A8383

a(n) = Sum_k k·A333275(n,k). A333277

Triangle, read by rows, equal to P⁴, where triangle P = A135880; also equals Q², where triangle Q = P² = A135885. A135891

Indices k such that A019322(k) = φ[k](4) is prime, where φ is a cyclotomic polynomial. A138934

Numbers m > 0 that have a divisor d > 1 with binomial(m+d, d) == 1 mod m. A290040

Number of nX2 0..1 arrays with every element unequal to 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A317890