Properties of the Number 19846

Nineteen Thousand Eight Hundred Forty-Six

Basics

Value: 19845 → 19846 → 19847

Parity: even

Prime: No

Previous Prime: 19843

Next Prime: 19853

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 × 9923

Divisors: 1, 2, 9923, 19846

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110110000110

Octal: 46606

Duodecimal: B59A

Hexadecimal: 4d86

Square: 393863716

Square Root: 140.87583185202493

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

a(0) = 1; for n > 0, a(n) = 41·n² + 2. A206399

Semiprimes in A056109. A113528

Sum of cubes of proper divisors of n. A276634

Ulam's spiral (SSE spoke). A143839

Augmentation of the triangular array P=A094727 given by p(n,k)=n+k+1 for 0<=k<=n. See Comments. A193093

Square array: T(n,k) = ((3ⁿ⁺¹ + 1)^k-1 + 2)/3, read by descending antidiagonals. A374258

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 80 ones. A31848

Number of permutations in S_n avoiding {bar 5}1243 (i.e., every occurrence of 1243 is contained in an occurrence of a 51243). A137547

Semiprimes of the form 5·n² + 1. A212707

Square array A(n,k), n>=0, k>=0, read by antidiagonals, where column k is the expansion of e.g.f. exp(k·x)*(BesselI(0,2·x) + BesselI(1,2·x)). A292630