20746223 has 16 divisors (see below), whose sum is σ = 22671360. Its totient is φ = 18933600.

The previous prime is 20746217. The next prime is 20746241. The reversal of 20746223 is 32264702.

It is a cyclic number.

It is not a de Polignac number, because 20746223 - 2²⁰ = 19697647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20746192 and 20746201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20746213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42008 + ... + 42498.

It is an arithmetic number, because the mean of its divisors is an integer number (1416960).

Almost surely, 2^20746223 is an apocalyptic number.

20746223 is a deficient number, since it is larger than the sum of its proper divisors (1925137).

20746223 is a wasteful number, since it uses less digits than its factorization.

20746223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 20746223 is about 4554.8021910946. The cubic root of 20746223 is about 274.7765589964.

The spelling of 20746223 in words is "twenty million, seven hundred forty-six thousand, two hundred twenty-three".