Properties of the Number 16720

Sixteen Thousand Seven Hundred Twenty

Basics

Value: 16719 → 16720 → 16721

Parity: even

Prime: No

Previous Prime: 16703

Next Prime: 16729

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ⁴ × 5 × 11 × 19

Divisors: 1, 2, 4, 5, 8, 10, 11, 16, 19, 20

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100000101010000

Octal: 40520

Duodecimal: 9814

Hexadecimal: 4150

Square: 279558400

Square Root: 129.3058390019569

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

Expansion of theta₃ / theta₄. A7096

Trajectory of n under the Reverse and Add! operation carried out in base 2 does not reach a palindrome and (presumably) does not join the trajectory of any term m < n. A75252

Expansion of φ(q²)² / (φ(-q) * φ(q⁴)) in powers of q where φ() is a Ramanujan θ function. A212318

T(n,k)=Number of nXk 0..1 arrays with every element equal to 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero. A298719

Expansion of 1+k in powers of q^1/2 where q is Jacobi's nome and k is the elliptic modulus. A134746

Numbers in A152022 which are not products of terms of A152021. A152023

Expansion of theta₄/theta₃ in powers of q. A189925

T(n,k)=Number of nXk 0..2 arrays with no element equal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. A279805

a(n) is the number of consecutive even prime gap pairs (g1, g2) satisfying g1 == 0 (mod 6) and g2 == 4 (mod 6) out of the first 2ⁿ consecutive even prime gap pairs. A345334

Expansion of (1/theta₄(q)² -1)/4 in powers of q. A2318