Properties of the Number 2020

Two Thousand Twenty

Basics

Value: 2019 → 2020 → 2021

Parity: even

Prime: No

Previous Prime: 2017

Next Prime: 2027

Digit Sum: 4

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 5 × 101

Divisors: 1, 2, 4, 5, 10, 20, 101, 202, 404, 505

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 11111100100

Octal: 3744

Duodecimal: 1204

Hexadecimal: 7e4

Square: 4080400

Square Root: 44.94441010848846

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

Doublets: base-10 representation is the juxtaposition of two identical strings. A20338

Number of monotone Boolean functions of n variables with 4 mincuts. Also Sperner systems with 4 blocks. A51112

Numbers whose sum of digits is 4. A52218

Multiples of 20 containing a 20 in their decimal representation. A121040

Representation of n in base of Catalan numbers (a classic greedy version). A14418

Numbers n such that Bernoulli number B_n has denominator 330. A272183

Sum of squares of four consecutive primes. A133524

Multiples of 4 whose digits add to 4. A63997

Expansion of 1 / f(-x¹, -x⁵) in powers of·where f() is Ramanujan's two-variable θ function. A195848

Numbers m such that there are precisely 20 groups of order m. A298911

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