Properties of the Number 20710

Twenty Thousand Seven Hundred Ten

Basics

Value: 20709 → 20710 → 20711

Parity: even

Prime: No

Previous Prime: 20707

Next Prime: 20717

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 2 × 5 × 19 × 109

Divisors: 1, 2, 5, 10, 19, 38, 95, 109, 190, 218

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000011100110

Octal: 50346

Duodecimal: BB9A

Hexadecimal: 50e6

Square: 428904100

Square Root: 143.9096939055879

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 that are the sum of 6 positive 9th powers. A3395

Sum of 10 nonzero 8th powers. A3388

a(1) = a(2) = 1, a(3) = 4; thereafter a(n) = a(n-1) + a(n-3). A1609

Base 4 perfect digital invariants (written in base 10): numbers equal to the sum of the k-th powers of their base-4 digits, for some k. A162219

Number of strings of length n over a 10-letter alphabet that begin with a nontrivial palindrome. A249643

a(n) = prime(n)*prime(n-1) - 1. A23515

a(n) = 2ⁿ⁺¹ + 3ⁿ + 3. A254028

Second partial sums of ninth powers (A001017). A253637

Terms of A122782 which are not Carmichael numbers A002997. A153515

a(n) = n*(n+1)*(6·n-5)/2. A172082