Properties of the Number 20535

Twenty Thousand Five Hundred Thirty-Five

Basics

Value: 20534 → 20535 → 20536

Parity: odd

Prime: No

Previous Prime: 20533

Next Prime: 20543

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 37 ²

Divisors: 1, 3, 5, 15, 37, 111, 185, 555, 1369, 4107

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000000110111

Octal: 50067

Duodecimal: BA73

Hexadecimal: 5037

Square: 421686225

Square Root: 143.30038380967443

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

Heinz numbers of integer partitions whose reciprocal sum is 1. A316855

Heinz numbers of aperiodic integer partitions into relatively prime parts whose reciprocal sum is 1. A316888

a(n) = 15·n². A64761

Number T(n,k) of colored integer partitions of n using all colors of a k-set such that each block of part i with multiplicity j has a pattern of i·j colors in (weakly) increasing order; triangle T(n,k), n>=0, 0<=k<=n, read by rows. A326500

a(n) is the number of edges formed by n-secting the angles of a pentagon. A335555

Heinz numbers of integer partitions into relatively prime parts whose reciprocal sum is 1. A316890

Composite numbers k such that D(k) == 3 (mod k), where D(k) is the k-th central Delannoy number (A001850). A330203

Main diagonal of A332372. A332373

Starting positions of strings of three 5's in the decimal expansion of π. A83620

Triangle read by rows: T(n,k) is the number of ordered trees with n edges and having k branches of even length (n>=0, 0<=k<=floor(n/2)). A102004