21323332232 has 8 divisors (see below), whose sum is σ = 39981247950. Its totient is φ = 10661666112.

The previous prime is 21323332213. The next prime is 21323332273. The reversal of 21323332232 is 23223332312.

It can be written as a sum of positive squares in only one way, i.e., 21314248036 + 9084196 = 145994^2 + 3014^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332708257 + ... + 1332708272.

Almost surely, 2^21323332232 is an apocalyptic number.

It is an amenable number.

21323332232 is a deficient number, since it is larger than the sum of its proper divisors (18657915718).

21323332232 is a wasteful number, since it uses less digits than its factorization.

21323332232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665416535 (or 2665416531 counting only the distinct ones).

The product of its digits is 7776, while the sum is 26.

Adding to 21323332232 its reverse (23223332312), we get a palindrome (44546664544).

The spelling of 21323332232 in words is "twenty-one billion, three hundred twenty-three million, three hundred thirty-two thousand, two hundred thirty-two".