Properties of the Number 18923

Eighteen Thousand Nine Hundred Twenty-Three

Basics

Value: 18922 → 18923 → 18924

Parity: odd

Prime: No

Previous Prime: 18919

Next Prime: 18947

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 127 × 149

Divisors: 1, 127, 149, 18923

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100100111101011

Octal: 44753

Duodecimal: AB4B

Hexadecimal: 49eb

Square: 358079929

Square Root: 137.56089560627322

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

Numbers k such that 4 is the smallest decimal digit of k³. A291643

Number of Catalan objects fixed by four-fold application of the Catalan bijections A057511/A057512 (Deep rotation of general parenthesizations/plane trees). A79225

Triangle T(n,d) (listed row-wise: T(1,1)=1, T(2,1)=1, T(2,2)=1, T(3,1)=2, T(3,2)=2, T(3,3)=1, ...) giving the number of n-edge general plane trees with root degree d that are fixed by the four-fold application of Catalan Automorphisms A057511/A057512 (Deep rotation of general parenthesizations/plane trees). A79220

n-th 4k+1 prime times n-th 4k-1 prime. A48630

Composite numbers·such that σ(x+120) = σ(x)+120. A54985

Number of strings of numbers x(i=1..6) in 0..n with sum i³*x(i) equal to 216·n. A184261

Number of 0..n arrays x(0..10) of 11 elements with zero 5th differences. A200373

Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1101-0111-0100 pattern in any orientation. A146859

Ulam numbers k such that 4·k and 16·k are also Ulam numbers. A287634

a(n) = floor(cosh(n+1) - cosh(n)). A346169