Properties of the Number 20369

Twenty Thousand Three Hundred Sixty-Nine

Basics

Value: 20368 → 20369 → 20370

Parity: odd

Prime: Yes

Previous Prime: 20359

Next Prime: 20389

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 20369

Divisors: 1, 20369

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100111110010001

Octal: 47621

Duodecimal: B955

Hexadecimal: 4f91

Square: 414896161

Square Root: 142.72000560538106

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 compositions of n where differences between neighboring parts are in {-1,1}. A173258

a(n) = a(n-1) + 3·a(n-2). A6138

Primes dividing nonzero terms in A003095: the iterates of x² + 1 starting at 0. A247981

Least prime in A031938 (lesser of primes differing by 20) whose distance to the next 20-twin is 6·n. A52359

Primes p for which there are exactly as many primes in the range [p², p·nextprime(p)] as there are in the range [p·nextprime(p), nextprime(p)²], where nextprime(p) gives the next prime after prime p. A256472

a(n) is the total number of squares after n iterations of the "Square Multiscale" substitution. A329919

a(n) = 2ⁿ-n⁴. A24014

Primes p such that p³ - 12 and p³ + 12 are also primes. A153322

Primes such that the sum of the factorials of the digits is a perfect square. A52279

Primes p such that continued fraction of (1+sqrt(p))/2 has period 5 : primes in A146330. A146350