Properties of the Number 20057

Twenty Thousand Fifty-Seven

Basics

Value: 20056 → 20057 → 20058

Parity: odd

Prime: No

Previous Prime: 20051

Next Prime: 20063

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 31 × 647

Divisors: 1, 31, 647, 20057

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100111001011001

Octal: 47131

Duodecimal: B735

Hexadecimal: 4e59

Square: 402283249

Square Root: 141.62273828732447

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 n such that there is an integer k with the property that k^τ(n) = σ(n). A225239

a(n) = floor(n*(n-1)*(n-2)*(n-3)/21). A11931

Number of length n+2 0..5 arrays with no three unequal elements in a row and no three equal elements in a row and new values 0..5 introduced in 0..5 order. A243724

Semiprimes that are the sum of the first n odd primes for some n. A274182

a(n) = position of n³ + (n+1)³ + (n+2)³ in A024975. A24980

a(n) = floor(γ(n+3/11)/γ(3/11)). A20057

Number of n X 4 nonnegative integer arrays with upper left 0 and lower right n+4-6 and value increasing by 0 or 1 with every step right or down. A252926