20201223 has 16 divisors (see below), whose sum is σ = 31616000. Its totient is φ = 11231136.

The previous prime is 20201191. The next prime is 20201227. The reversal of 20201223 is 32210202.

It is not a de Polignac number, because 20201223 - 2⁵ = 20201191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201199 and 20201208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12223 + ... + 13776.

It is an arithmetic number, because the mean of its divisors is an integer number (1976000).

Almost surely, 2^20201223 is an apocalyptic number.

20201223 is a deficient number, since it is larger than the sum of its proper divisors (11414777).

20201223 is a wasteful number, since it uses less digits than its factorization.

20201223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26046.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 20201223 is about 4494.5770657538. The cubic root of 20201223 is about 272.3490643526.

Adding to 20201223 its reverse (32210202), we get a palindrome (52411425).

The spelling of 20201223 in words is "twenty million, two hundred one thousand, two hundred twenty-three".