ℕ atory
Play Now

Properties of the Number 20269

Twenty Thousand Two Hundred Sixty-Nine

Basics

Value: 20268 → 20269 → 20270

Parity: odd

Prime: Yes

Previous Prime: 20261

Next Prime: 20287

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 20269

Divisors: 1, 20269

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100111100101101

Octal: 47455

Duodecimal: B891

Hexadecimal: 4f2d

Square: 410832361

Square Root: 142.36923825040296

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 (11k - 5k)/6 is prime. A128347
Luhn primes: primes p such that p + (p reversed) is also a prime. A61783
Primes p whose period of reciprocal equals (p-1)/9. A56214
a(0) = 13; for n > 0, a(n) is the greatest prime factor of PreviousPrime(a(n-1))*a(n-1)-1 where PreviousPrime(prime(k))=prime(k-1). A31442
Primes congruent to 34 mod 71. A154624
Pairs of consecutive primes {p,q} for which the numbers of distinct residues of all factorials mod p and mod q coincide. A210242
Number of set partitions of [n] such that all absolute differences between least elements of consecutive blocks and between consecutive elements within the blocks are not larger than seven. A287586
Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 88 ones. A31856
Primes from merging of 5 successive digits in decimal expansion of exp(2). A105001
Primes congruent to 32 mod 59. A142759