20212220323 has 4 divisors (see below), whose sum is σ = 20357632120. Its totient is φ = 20066808528.

The previous prime is 20212220321. The next prime is 20212220333. The reversal of 20212220323 is 32302221202.

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 20212220323 - 2¹ = 20212220321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20212220323.

It is not an unprimeable number, because it can be changed into a prime (20212220321) 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, 72705690 + ... + 72705967.

It is an arithmetic number, because the mean of its divisors is an integer number (5089408030).

Almost surely, 2^20212220323 is an apocalyptic number.

20212220323 is a deficient number, since it is larger than the sum of its proper divisors (145411797).

20212220323 is a wasteful number, since it uses less digits than its factorization.

20212220323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145411796.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20212220323 its reverse (32302221202), we get a palindrome (52514441525).

The spelling of 20212220323 in words is "twenty billion, two hundred twelve million, two hundred twenty thousand, three hundred twenty-three".