Properties of the Number 19670

Nineteen Thousand Six Hundred Seventy

Basics

Value: 19669 → 19670 → 19671

Parity: even

Prime: No

Previous Prime: 19661

Next Prime: 19681

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 × 5 × 7 × 281

Divisors: 1, 2, 5, 7, 10, 14, 35, 70, 281, 562

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110011010110

Octal: 46326

Duodecimal: B472

Hexadecimal: 4cd6

Square: 386908900

Square Root: 140.24977718342373

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

Weird numbers: abundant (A005101) but not pseudoperfect (A005835). A6037

The n-th n-gonal number: a(n) = n*(n² - 3·n + 4)/2. A60354

a(n) = (2·n - 1)*(11·n² - 11·n + 6)/6. A63492

Unitary weird numbers: unitary abundant (A034683) but not unitary pseudoperfect (A293188). A64114

Triangle read by rows: T(n,k) is the number of permutations of an n-set having k cycles of size > 1 (0<=k<=floor(n/2)). A136394

Truncated square pyramid numbers: a(n) = ∑_{k = n..2·n} k². A50409

Bi-unitary weird numbers: bi-unitary abundant numbers (A292982) that are not bi-unitary pseudoperfect (A292985). A292986

Infinitary weird numbers: infinitary abundant numbers (A129656) that are not infinitary pseudoperfect numbers (A306983). A306984

Starts of runs of 3 consecutive Pell-Niven numbers (A352320). A352322

Numbers of the form prime(n)*(prime(n)-1)/4. A171555