21313443332 has 6 divisors (see below), whose sum is σ = 37298525838. Its totient is φ = 10656721664.

The previous prime is 21313443289. The next prime is 21313443341. The reversal of 21313443332 is 23334431312.

It can be written as a sum of positive squares in only one way, i.e., 21276306496 + 37136836 = 145864^2 + 6094^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21313443295 and 21313443304.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2664180413 + ... + 2664180420.

It is an arithmetic number, because the mean of its divisors is an integer number (6216420973).

Almost surely, 2^21313443332 is an apocalyptic number.

It is an amenable number.

21313443332 is a deficient number, since it is larger than the sum of its proper divisors (15985082506).

21313443332 is a wasteful number, since it uses less digits than its factorization.

21313443332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5328360837 (or 5328360835 counting only the distinct ones).

The product of its digits is 15552, while the sum is 29.

Adding to 21313443332 its reverse (23334431312), we get a palindrome (44647874644).

The spelling of 21313443332 in words is "twenty-one billion, three hundred thirteen million, four hundred forty-three thousand, three hundred thirty-two".