Properties of the Number 4020

Four Thousand Twenty

Basics

Value: 4019 → 4020 → 4021

Parity: even

Prime: No

Previous Prime: 4019

Next Prime: 4021

Digit Sum: 6

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 5 × 67

Divisors: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 111110110100

Octal: 7664

Duodecimal: 23B0

Hexadecimal: fb4

Square: 16160400

Square Root: 63.40346993658943

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 aperiodic binary strings of length n; also number of binary sequences with primitive period n. A27375

Coordination sequence for "svh" 3D uniform tiling. A299283

Table T(n,k) by antidiagonals. T(n,k) is the number of length n primitive (=aperiodic or period n) k-ary words (n,k >= 1). A143324

Coordination sequence for (2,4,7) tiling of hyperbolic plane. A265062

Number of partitions of n whose median is not a part. A238479

Multiples of 6 such that the sum of the digits is equal to 6. A62768

Numbers n such that n is both the average of some twin prime pair p, q (q = p+2) (i.e., n = p+1 = q-1) and is also the average of the prime before p and the prime after q. A256753

Number of n-vertex labeled graphs that are gracefully labeled trees. A33472

T(n,k) = Number of (n+1)X(k+1) 0..2 arrays with 2X2 subblock determinants differing from horizontal neighbors and permanents differing from vertical neighbors. A205894

Row sums of triangle T(m,n) = number of solutions to 1 <= a(1) < a(2) < ... < a(m) <= n, where gcd(a(1), a(2), ..., a(m), n) = 1, in A020921. A38199