21333223232 has 28 divisors (see below), whose sum is σ = 42752267556. Its totient is φ = 10560998400.

The previous prime is 21333223229. The next prime is 21333223267. The reversal of 21333223232 is 23232233312.

It can be written as a sum of positive squares in 2 ways, for example, as 11078825536 + 10254397696 = 105256^2 + 101264^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1643693 + ... + 1656620.

Almost surely, 2^21333223232 is an apocalyptic number.

It is an amenable number.

21333223232 is an abundant number, since it is smaller than the sum of its proper divisors (21419044324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21333223232 is a wasteful number, since it uses less digits than its factorization.

21333223232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3300426 (or 3300416 counting only the distinct ones).

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

Adding to 21333223232 its reverse (23232233312), we get a palindrome (44565456544).

The spelling of 21333223232 in words is "twenty-one billion, three hundred thirty-three million, two hundred twenty-three thousand, two hundred thirty-two".