20201220223 has 8 divisors (see below), whose sum is σ = 21275493120. Its totient is φ = 19128052440.

The previous prime is 20201220209. The next prime is 20201220239. The reversal of 20201220223 is 32202210202.

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

It is a cyclic number.

It is not a de Polignac number, because 20201220223 - 2¹⁷ = 20201089151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201220197 and 20201220206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201220203) 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 7 ways as a sum of consecutive naturals, for example, 238615 + ... + 311992.

It is an arithmetic number, because the mean of its divisors is an integer number (2659436640).

Almost surely, 2^20201220223 is an apocalyptic number.

20201220223 is a deficient number, since it is larger than the sum of its proper divisors (1074272897).

20201220223 is a wasteful number, since it uses less digits than its factorization.

20201220223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552557.

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 20201220223 its reverse (32202210202), we get a palindrome (52403430425).

The spelling of 20201220223 in words is "twenty billion, two hundred one million, two hundred twenty thousand, two hundred twenty-three".