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Properties of the Number 20000

Twenty Thousand

Basics

Value: 19999 → 20000 → 20001

Parity: even

Prime: No

Previous Prime: 19997

Next Prime: 20011

Digit Sum: 2

Digital Root: 2

Palindrome: No

Factorization: 2 5 × 5 4

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 25, 32

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 100111000100000

Octal: 47040

Duodecimal: B6A8

Hexadecimal: 4e20

Square: 400000000

Square Root: 141.4213562373095

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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 k such that the k-th triangular number contains only digits {0,1,2}. A119034
Sums of two powers of 10. A52216
4-full numbers: if a prime p divides k then so does p4. A36967
Numbers whose prime factors are 2 and 5. A33846
Numbers that contain only one nonzero digit. A37124
Smallest multiple of n with digit sum = 2, or 0 if no such number exists, e.g., a(3k)=0. A69521
Multiples of 2 whose digit sum is 2. A69537
Smallest multiple of n using only digits 0 and 2. A78241
Numbers k such that k2 contains exactly 2 distinct digits. A16069
Numbers of form 2i*10j, with i, j >= 0. A25612