21200223232 has 22 divisors (see below), whose sum is σ = 42379745168. Its totient is φ = 10600111104.

The previous prime is 21200223229. The next prime is 21200223263. The reversal of 21200223232 is 23232200212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10350648 + ... + 10352695.

Almost surely, 2^21200223232 is an apocalyptic number.

It is an amenable number.

21200223232 is a deficient number, since it is larger than the sum of its proper divisors (21179521936).

21200223232 is an equidigital number, since it uses as much as digits as its factorization.

21200223232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20703363 (or 20703345 counting only the distinct ones).

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

Adding to 21200223232 its reverse (23232200212), we get a palindrome (44432423444).

The spelling of 21200223232 in words is "twenty-one billion, two hundred million, two hundred twenty-three thousand, two hundred thirty-two".