Properties of the Number 19453

Nineteen Thousand Four Hundred Fifty-Three

Basics

Value: 19452 → 19453 → 19454

Parity: odd

Prime: No

Previous Prime: 19447

Next Prime: 19457

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 7 ² × 397

Divisors: 1, 7, 49, 397, 2779, 19453

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100101111111101

Octal: 45775

Duodecimal: B311

Hexadecimal: 4bfd

Square: 378419209

Square Root: 139.47401191619892

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

In base 4, n sets a new record for the number of Reverse and Add! steps needed to reach a palindrome starting with n. A75686

Denominators of continued fraction convergents to sqrt(140). A41257

a(n) = K₃(n) = ∑_k>=0 A090285(3,k)*2^k*binomial(n,k). a(n) = (4·n³+30·n²+56·n+15)/3. A90294

Triangle T(n, d) = the number of isomorphism classes of smooth Fano d-polytopes with n vertices, read by rows (n >= 2, 1 <= d < n). A127709

Number of (w,x,y,z) with all terms in {1,...,n} and w+x+y=|x-y|+|y-z|. A212678

p-INVERT of (1,0,1,0,0,0,0,...), where p(S) = 1 - S - S³. A291735

a(n) = n·2¹⁰ - 3. A362361

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 76 ones. A31844

a(n) = T(4,n), array T given by A047858. A47861

Sequence defined by the recurrence formula a(n+1)=sum(a(p)*a(n-p)+k,p=0..n)+l for n>=1, with here a(0)=1, a(1)=3, k=-1 and l=1. A176964