Properties of the Number 20929

Twenty Thousand Nine Hundred Twenty-Nine

Basics

Value: 20928 → 20929 → 20930

Parity: odd

Prime: Yes

Previous Prime: 20921

Next Prime: 20939

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 20929

Divisors: 1, 20929

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 101000111000001

Octal: 50701

Duodecimal: 10141

Hexadecimal: 51c1

Square: 438023041

Square Root: 144.66858677681205

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

Expansion of b(2)*b(4)*b(6)/(x⁸-x⁴-x+1), where b(k) = (1-x^k)/(1-x). A265055

Number of semi-sums of integer partitions of n. A366738

Primes that divide at least one term of Sylvester's sequence s = A000058: s(n+1) = s(n)² - s(n) + 1, s(0) = 2. A7996

Primes p such that A001175(p) = (p-1)/6. A308791

Primes having only {0, 2, 9} as digits. A261268

Primes in which the digit string can be partitioned into three parts such that the sum of the first two is equal to the third, and the second part is nonzero. A88291

Primes which remain prime after one and after two applications of the rotate-and-add operation of A086002. A86003

Primes p such that each decimal digit of p is equal to the difference of two other digits of p. A255892

Primes of the form 128n+65. A105129

Prime numbers congruent to 49 or 121 modulo 240 representable by x² + 150·y². A325089