Properties of the Number 20011

Twenty Thousand Eleven

Basics

Value: 20010 → 20011 → 20012

Parity: odd

Prime: Yes

Previous Prime: 19997

Next Prime: 20021

Digit Sum: 4

Digital Root: 4

Palindrome: No

Factorization: 20011

Divisors: 1, 20011

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 100111000101011

Octal: 47053

Duodecimal: B6B7

Hexadecimal: 4e2b

Square: 400440121

Square Root: 141.4602417642498

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

Primes whose base-3 representation also is the base-2 representation of a prime. A235265

Primes whose sum of digits is 4. A62339

Primes having only {0, 1, 2} as digits. A36953

Luhn primes: primes p such that p + (p reversed) is also a prime. A61783

Smallest n-digit prime starting with a 2. A69590

Primes with maximal digit = 2. A106100

Centered triangular numbers that are prime. A125602

Ternary numbers that are concatenated runs C(1)B(1)A(1)C(2)B(2)A(2)...C(k)B(k)A(k), where A(i) is a run of 1's, B(i) a run of 0's, and C(i) a run of 2's, for i = 1..k. A371109

Numbers k such that 3 and 5 do not divide binomial(2·k, k). A129508

Number of partitions of n such that the absolute value of the difference between the number of odd parts and the number of even parts is <=1. A239835