Properties of the Number 20460

Twenty Thousand Four Hundred Sixty

Basics

Value: 20459 → 20460 → 20461

Parity: even

Prime: No

Previous Prime: 20443

Next Prime: 20477

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 5 × 11 × 31

Divisors: 1, 2, 3, 4, 5, 6, 10, 11, 12, 15

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100111111101100

Octal: 47754

Duodecimal: BA10

Hexadecimal: 4fec

Square: 418611600

Square Root: 143.03845636750978

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

a(n) = floor(n*φ¹⁵), where φ is the golden ratio, A001622. A4930

a(n) = (3·n+1)*(4·n+1). A33577

n! in base n. A6993

a(n) = 3rd elementary symmetric function of the first n+2 positive integers congruent to 1 mod 4. A24379

n! in base 7. A127114

a(n) = n·Lucas(n). A146005

Triangle read by rows: T(n, k) is the Sheffer triangle ((1 - 4·x)^-1/4, (-1/4)*log(1 - 4·x)). A generalized Stirling1 triangle. A290319

Number of maximal subsets of {1..n} containing no sums or products of distinct elements. A326025

Numbers k such that ψ(k²) = k, ψ = A002322; indices of 1 in A341857. A341858

First differences of A069473. A69474