Properties of the Number 20157

Twenty Thousand One Hundred Fifty-Seven

Basics

Value: 20156 → 20157 → 20158

Parity: odd

Prime: No

Previous Prime: 20149

Next Prime: 20161

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 6719

Divisors: 1, 3, 6719, 20157

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100111010111101

Octal: 47275

Duodecimal: B7B9

Hexadecimal: 4ebd

Square: 406304649

Square Root: 141.97534997315555

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

Number of connected components of n faces of the snub cube up to the 24 rotations of the snub cube. A384072

Integers m such that σ(m) + σ(m+1) + σ(m+2) - σ(m+3) <= 0, where σ is the sum of divisors. A348698

Number of ways to partition n elements into pie slices of different sizes of at least 2 allowing the pie to be turned over. A32230

a(n) = A160799(n)/4. A160807

Number of 0..n arrays of length 6 with each element differing from at least one neighbor by 1 or less, starting with 0. A221685

Numbers k such that k! - 1 is prime. A2982

Pseudoprimes to base 29. A20157

Number of ways to place 6 nonattacking grasshoppers on an n·n chessboard. A190579

Number of 6Xn 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 0 0 vertically. A207964