Properties of the Number -20230

Twenty Thousand Two Hundred Thirty

Basics

Value: -20231 → -20230 → -20229

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 2 × 5 × 7 × 17 ²

Divisors: 1, 2, 5, 7, 10, 14, 17, 34, 35, 70

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100111100000110

Octal: -47406

Duodecimal: -B85A

Hexadecimal: -4f06

Square: 409252900

Square Root: 142.23220451079285

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

Pentagonal pyramidal numbers: a(n) = n²*(n+1)/2. A2411

Number of reduced words of length n in the Weyl group D₇. A162210

Multiples of 7 whose sum of digits is equal to 7. A63416

Unitary weird numbers: unitary abundant (A034683) but not unitary pseudoperfect (A293188). A64114

Number of labeled 4-trees with n nodes. A36506

Triangle read by rows: T(n,r) = number of maximum r-uniform acyclic hypergraphs of order n and size n-r+1, 1 <= r <= n+1. A135021

Square array A(n,k) read by descending antidiagonals where A(n,k) is the k-th solution·to A328248(x) = n-1. A328250

Triangle read by rows: T(n,k) is the number of endofunctions on [n] whose second-smallest component has size exactly k; n >= 0, 0 <= k <= max(0,n-1). A350079

Even pentagonal pyramidal numbers. A15224

a(n) = n*(2*(n - 2)*n + (-1)ⁿ + 3)/4. A323724