20816223 has 8 divisors (see below), whose sum is σ = 27955200. Its totient is φ = 13777368.

The previous prime is 20816207. The next prime is 20816231. The reversal of 20816223 is 32261802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20816223 - 2⁴ = 20816207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20816193 and 20816202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20816623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24543 + ... + 25376.

It is an arithmetic number, because the mean of its divisors is an integer number (3494400).

Almost surely, 2^20816223 is an apocalyptic number.

20816223 is a deficient number, since it is larger than the sum of its proper divisors (7138977).

20816223 is a wasteful number, since it uses less digits than its factorization.

20816223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50061.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20816223 is about 4562.4799177640. The cubic root of 20816223 is about 275.0852540081.

The spelling of 20816223 in words is "twenty million, eight hundred sixteen thousand, two hundred twenty-three".