Properties of the Number 19813

Nineteen Thousand Eight Hundred Thirteen

Basics

Value: 19812 → 19813 → 19814

Parity: odd

Prime: Yes

Previous Prime: 19801

Next Prime: 19819

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 19813

Divisors: 1, 19813

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110101100101

Octal: 46545

Duodecimal: B571

Hexadecimal: 4d65

Square: 392554969

Square Root: 140.75865870347016

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

Numbers k such that k, k+1, k+2 and k+3 are 1,2,3,4-almost primes. A113000

Numbers k such that the digits of k² are exactly the same (albeit in different order) as the digits of (k+1)². A72841

Number of periodic palindromic structures of length n using a maximum of three different symbols. A56504

Numbers k such that σ(φ(σ(k))) = φ(σ(φ(k))). A67160

Primes which are not the sum of consecutive composite numbers. A37174

Non-palindromic balanced primes in base 2. A256081

Number of (w,x,y,z) with all terms in {1,...,n} and w·x<=2·y*z. A211787

Primes which are not the sum of two or more consecutive nonprime numbers. A257393

Number of 2 X 2 matrices with all elements in {0,1,...,n} and nonnegative determinant. A210290

Sum of the primes in ordered 3 X 3 prime squares. A105089