Properties of the Number 19642

Nineteen Thousand Six Hundred Forty-Two

Basics

Value: 19641 → 19642 → 19643

Parity: even

Prime: No

Previous Prime: 19609

Next Prime: 19661

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 7 × 23 × 61

Divisors: 1, 2, 7, 14, 23, 46, 61, 122, 161, 322

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100110010111010

Octal: 46272

Duodecimal: B44A

Hexadecimal: 4cba

Square: 385808164

Square Root: 140.14991972883894

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 of n with nonnegative rank. A64174

Numbers which converge to 2592 under repeated application of the powertrain map of A133500. A135384

Table read by antidiagonals: Place k equally spaced points on each side of a regular n-gon and join every pair of these n·k points by a chord; T(n,k) (n >= 3, k >= 0) gives the number of internal vertices in the resulting planar graph. A367303

Sum of the numbers already killed in the first jump of a Sieve of Eratosthenes table. A179628

Numbers k such that 3^k + 100 is prime. A219618

Sum of distances between leftmost and rightmost peaks in all bargraphs of semiperimeter n. A277999

Antidiagonal sums of A382310. A382311

Number of domicule tilings of a 6 X n grid. A239268

Decimal expansion of sqrt(2*π*e)/19. A19642