Properties of the Number 20456

Twenty Thousand Four Hundred Fifty-Six

Basics

Value: 20455 → 20456 → 20457

Parity: even

Prime: No

Previous Prime: 20443

Next Prime: 20477

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ³ × 2557

Divisors: 1, 2, 4, 8, 2557, 5114, 10228, 20456

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100111111101000

Octal: 47750

Duodecimal: BA08

Hexadecimal: 4fe8

Square: 418447936

Square Root: 143.024473430249

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 11 positive 8th powers. A3389

Numbers n such that p(n),p(n)+6,p(n)+12,p(n)+18 are consecutive primes and p(n)=6·k+1 for some k, where p(n) denotes n-th prime. A90838

Expansion of (χ(q)⁴ / χ(-q))² in powers of q where χ() is a Ramanujan θ function. A143895

McKay-Thompson series of class 16A for Monster. A58514

Numbers k such that prime(k) == 1 (mod σ(k)). A67697

Number of n X 4 0..1 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing. A223834

Number of partitions of n, where the difference between the number of odd parts and the number of even parts is 7. A240016

Irregular triangle read by rows: the right-hand side of the triangle in A349815. A349816

Number of step cyclic shifted sequence structures using exactly three different symbols. A56435

(A192533)/2. A192534