Properties of the Number 20320

Twenty Thousand Three Hundred Twenty

Basics

Value: 20319 → 20320 → 20321

Parity: even

Prime: No

Previous Prime: 20297

Next Prime: 20323

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 2 ⁵ × 5 × 127

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100111101100000

Octal: 47540

Duodecimal: B914

Hexadecimal: 4f60

Square: 412902400

Square Root: 142.5482374496437

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

28-gonal numbers: a(n) = n*(13·n - 12). A161935

Numbers n such that σ(n) = 6*φ(n). A104900

a(n) = sum of all divisors of all positive integers <= prime(n). A244583

Left edge of the triangle in A033291. A192735

Number of nonequivalent ways (mod D₃) to place 3 points on an n X n X n triangular grid so that no two of them are on the same row, column or diagonal. A283114

Aliquot-like sequence based on the largest aliquot divisor of the sum of divisors of n (A371418) that starts with 222. A371423

Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 2,0,3. A37624

Row sums of A163357 and A163359. A163365

Triangle of coefficients of polynomials v(n,x) jointly generated with A210747; see the Formula section. A210748

Sum of all prime encoded complete partitions of n. A360791