Properties of the Number 19380

Nineteen Thousand Three Hundred Eighty

Basics

Value: 19379 → 19380 → 19381

Parity: even

Prime: No

Previous Prime: 19379

Next Prime: 19381

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 5 × 17 × 19

Divisors: 1, 2, 3, 4, 5, 6, 10, 12, 15, 17

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100101110110100

Octal: 45664

Duodecimal: B270

Hexadecimal: 4bb4

Square: 375584400

Square Root: 139.21206844235883

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

Number of integer partitions of n having a unique part of least multiplicity. A362610

Irregular triangle read by rows: T(n,k) is the number of binary pattern classes in the (10,n)-rectangular grid with k '1's and (10n-k) '0's: two patterns are in the same class if one of them can be obtained by a reflection or 180-degree rotation of the other. A228169

Super ballot numbers: 60*(2n)!/(n!*(n+3)!). A7272

a(n) = n*(n+1)*(n+2)*(n+3)/6. A33488

a(n) = E(k)*C(n+k,k) = Euler(k)*binomial(n+k,k) for k=4. A154286

Normalized triangle of odd numbered entries of even numbered rows of Pascal's triangle A007318. A91043

Coefficients of Chebyshev polynomials. A5583

Numbers k such that k-1, k+1 and k²+1 are prime numbers. A70155

Sum of the third largest parts of the partitions of n into 9 parts. A326471

Numbers k such that k+1, k²+1 and k⁴+1 are primes. A70325