20012220223 has 4 divisors (see below), whose sum is σ = 20237076720. Its totient is φ = 19787363728.

The previous prime is 20012220169. The next prime is 20012220251. The reversal of 20012220223 is 32202221002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20012220223 - 2¹⁷ = 20012089151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012220197 and 20012220206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012220023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112428115 + ... + 112428292.

It is an arithmetic number, because the mean of its divisors is an integer number (5059269180).

Almost surely, 2^20012220223 is an apocalyptic number.

20012220223 is a deficient number, since it is larger than the sum of its proper divisors (224856497).

20012220223 is an equidigital number, since it uses as much as digits as its factorization.

20012220223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224856496.

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

Adding to 20012220223 its reverse (32202221002), we get a palindrome (52214441225).

The spelling of 20012220223 in words is "twenty billion, twelve million, two hundred twenty thousand, two hundred twenty-three".