Properties of the Number 21927

Twenty-One Thousand Nine Hundred Twenty-Seven

Basics

Value: 21926 → 21927 → 21928

Parity: odd

Prime: No

Previous Prime: 21911

Next Prime: 21929

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 7309

Divisors: 1, 3, 7309, 21927

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 101010110100111

Octal: 52647

Duodecimal: 10833

Hexadecimal: 55a7

Square: 480793329

Square Root: 148.0776823157359

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

a(n) = least k such that the remainder when 28^k is divided by k is n. A128368

Number of 4's in all partitions of n. A24788

Moebius transform of binomial(n+3, 4). A117109

Numerators of continued fraction convergents to sqrt(335). A41632

a(n) is the least number such that d(a(n)) = d(R(a(n)))/n, where R(n) is the digit reverse of n and d(n) is the number of divisors of n. A284495

Numbers whose base-5 representation contains exactly three 0's and three 2's. A45187

Number of (n+1) X (n+1) -5..5 symmetric matrices with every 2 X 2 subblock having sum zero and one or three distinct values. A211331

Expansion of ∏_k>=1 1/(1 - x^k*(k+1/2))^A072964(k). A321507

Decimal expansion of 1/923. A21927