Properties of the Number 19750

Nineteen Thousand Seven Hundred Fifty

Basics

Value: 19749 → 19750 → 19751

Parity: even

Prime: No

Previous Prime: 19739

Next Prime: 19751

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 5 ³ × 79

Divisors: 1, 2, 5, 10, 25, 50, 79, 125, 158, 250

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100110100100110

Octal: 46446

Duodecimal: B51A

Hexadecimal: 4d26

Square: 390062500

Square Root: 140.53469322555196

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

T(n,k) = Number of n X k integer arrays with each element equal to the number of horizontal, diagonal and antidiagonal neighbors exactly one smaller than itself. A266131

T(n,k)=Number of nXk 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes. A278778

Sum of the seventh largest parts in the partitions of n into 8 parts. A308991

Expansion of ∏_k>=1 (1 + x^k²)^k². A291649

The Wiener index of the comb-shaped graph |_|_|...|_| with 2n (n>=1) nodes. The Wiener index of a connected graph is the sum of the distances between all unordered pairs of vertices in the graph. A192023

The binary expansion of a(n) is the first n terms of 2 - A000002. A329356

Terms appearing more than once in A309940, in ascending order. A328257

a(n) = 5^2·n * [xⁿ] ∏_k>=1 1/(1 - 2·x^k)^1/5. A370733

Number of n X 4 integer arrays with each element equal to the number of horizontal, diagonal and antidiagonal neighbors exactly one smaller than itself. A266127

Number of nX4 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes. A278774