20420122223 has 4 divisors (see below), whose sum is σ = 21307953648. Its totient is φ = 19532290800.

The previous prime is 20420122211. The next prime is 20420122259. The reversal of 20420122223 is 32222102402.

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 20420122223 - 2¹⁶ = 20420056687 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20420122195 and 20420122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420122423) 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, 443915678 + ... + 443915723.

It is an arithmetic number, because the mean of its divisors is an integer number (5326988412).

Almost surely, 2^20420122223 is an apocalyptic number.

20420122223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20420122223 is a deficient number, since it is larger than the sum of its proper divisors (887831425).

20420122223 is an equidigital number, since it uses as much as digits as its factorization.

20420122223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887831424.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20420122223 its reverse (32222102402), we get a palindrome (52642224625).

The spelling of 20420122223 in words is "twenty billion, four hundred twenty million, one hundred twenty-two thousand, two hundred twenty-three".