21102303232 has 24 divisors (see below), whose sum is σ = 42194306700. Its totient is φ = 10551150592.

The previous prime is 21102303221. The next prime is 21102303239. The reversal of 21102303232 is 23230320112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102303239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5149882 + ... + 5153977.

Almost surely, 2^21102303232 is an apocalyptic number.

It is an amenable number.

21102303232 is a deficient number, since it is larger than the sum of its proper divisors (21092003468).

21102303232 is an equidigital number, since it uses as much as digits as its factorization.

21102303232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10303881 (or 10303861 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21102303232 its reverse (23230320112), we get a palindrome (44332623344).

The spelling of 21102303232 in words is "twenty-one billion, one hundred two million, three hundred three thousand, two hundred thirty-two".