Properties of the Number 19849

Nineteen Thousand Eight Hundred Forty-Nine

Basics

Value: 19848 → 19849 → 19850

Parity: odd

Prime: No

Previous Prime: 19843

Next Prime: 19853

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 23 × 863

Divisors: 1, 23, 863, 19849

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

375 Try Today's Challenge

Representations

Binary: 100110110001001

Octal: 46611

Duodecimal: B5A1

Hexadecimal: 4d89

Square: 393982801

Square Root: 140.88647912415158

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 partitions that are "2-close" to being self-conjugate. A108961

Numbers n such that primorial(n)/2 - 64 is prime. A139448

a(n) = 2·n³ - 3·n² + 5. A152064

Numbers n such that there is an integer k with the property that k^τ(n) = σ(n). A225239

Take pairs (a, b), sorted on a, such that T(a)+T(b)=concatenation of a and b, where T(k) is the k-th triangular number A000217(k). Sequence gives values of a. A96031

Numbers k such that 4k+1 is a palindromic prime. A192261

Numerators of coefficients in expansion of (sin(x))/(1 - x - x²). A279332

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 90 ones. A31858

Partial sums of A006567. A172463

Smallest k such that 40^k mod k = n. A178201