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Properties of the Number 20964

Twenty Thousand Nine Hundred Sixty-Four

Basics

Value: 20963 → 20964 → 20965

Parity: even

Prime: No

Previous Prime: 20963

Next Prime: 20981

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 2 × 3 × 1747

Divisors: 1, 2, 3, 4, 6, 12, 1747, 3494, 5241, 6988

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000111100100

Octal: 50744

Duodecimal: 10170

Hexadecimal: 51e4

Square: 439489296

Square Root: 144.78950238190612

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 9 nonzero 8th powers. A3387
Near Cullen numbers: k such that (k+1)*2k + 1 is prime. A29544
Total number of parts in all partitions of n into relatively prime parts. A85410
Number of compositions of n containing no part p of multiplicity p. A336269
a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 4, where m = n - 1 - 2p and p is the unique integer such that 2p < n - 1 <= 2p+1, with a(1) = a(2) = 1 and a(3) = 2. A49938
Records in A030000. A372044
Numerators of continued fraction convergents to sqrt(771). A42486
McKay-Thompson series of class 18f for the Monster group. A58544
McKay-Thompson series of class 18g for the Monster group. A112156
a(n) is the number of digits in the decimal representation of the smallest power of n that contains nine consecutive identical digits. A217184