20001232223 has 16 divisors (see below), whose sum is σ = 23057475840. Its totient is φ = 16995090816.

The previous prime is 20001232219. The next prime is 20001232247. The reversal of 20001232223 is 32223210002.

It is a cyclic number.

It is not a de Polignac number, because 20001232223 - 2² = 20001232219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001232123) 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 15 ways as a sum of consecutive naturals, for example, 649511 + ... + 679607.

It is an arithmetic number, because the mean of its divisors is an integer number (1441092240).

Almost surely, 2^20001232223 is an apocalyptic number.

20001232223 is a deficient number, since it is larger than the sum of its proper divisors (3056243617).

20001232223 is a wasteful number, since it uses less digits than its factorization.

20001232223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30926.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 20001232223 its reverse (32223210002), we get a palindrome (52224442225).

The spelling of 20001232223 in words is "twenty billion, one million, two hundred thirty-two thousand, two hundred twenty-three".