Properties of the Number 18969

Eighteen Thousand Nine Hundred Sixty-Nine

Basics

Value: 18968 → 18969 → 18970

Parity: odd

Prime: No

Previous Prime: 18959

Next Prime: 18973

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 3 × 6323

Divisors: 1, 3, 6323, 18969

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100101000011001

Octal: 45031

Duodecimal: AB89

Hexadecimal: 4a19

Square: 359822961

Square Root: 137.72799279739758

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

Sum of the largest parts in the partitions of n into 7 squarefree parts. A308960

The number of partitions of n into parts so that there exists exactly one part whose multiplicity is equal to its value. A391611

Odd numbers k such that φ(k) and cototient(k) have the same prime signature. A280927

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 72 ones. A31840

Number of 5 X n 0..1 arrays with rows and antidiagonals unimodal and columns nondecreasing. A224149

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 814", based on the 5-celled von Neumann neighborhood. A273644

T(n,k) = Number of n X k 0..1 arrays with rows and antidiagonals unimodal and columns nondecreasing. A224146

Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AFT = AlPO4-52 starting with a T3 atom. A18969