Properties of the Number 20197

Twenty Thousand One Hundred Ninety-Seven

Basics

Value: 20196 → 20197 → 20198

Parity: odd

Prime: No

Previous Prime: 20183

Next Prime: 20201

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 19 × 1063

Divisors: 1, 19, 1063, 20197

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100111011100101

Octal: 47345

Duodecimal: B831

Hexadecimal: 4ee5

Square: 407918809

Square Root: 142.11614968046382

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 7 nonzero 8th powers. A3385

Numbers that are the sum of 4 positive 9th powers. A3393

Pseudoprimes to base 7. A5938

Strong pseudoprimes to base 7. A20233

Centered 36-gonal numbers. A195316

Sum of the second largest parts in the partitions of n into 7 parts. A308932

Euler pseudoprimes to base 7: composite integers such that abs(7^{(n - 1}/2)) == 1 mod n. A262054

Number of partitions p of n such that the number of parts is not a part and max(p) - min(p) is a part. A241383

Expansion of ∏_k>=1 (1 + x^k)^sigma₉(k). A301553

a(n) = ∑_k=0..n floor(sqrt(k))⁴. A363498