21202320032 has 48 divisors (see below), whose sum is σ = 44211643560. Its totient is φ = 9974366208.

The previous prime is 21202320011. The next prime is 21202320067. The reversal of 21202320032 is 23002320212.

It can be written as a sum of positive squares in 4 ways, for example, as 20991373456 + 210946576 = 144884^2 + 14524^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3385448 + ... + 3391704.

Almost surely, 2^21202320032 is an apocalyptic number.

It is an amenable number.

21202320032 is an abundant number, since it is smaller than the sum of its proper divisors (23009323528).

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

21202320032 is a wasteful number, since it uses less digits than its factorization.

21202320032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12513 (or 12505 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 21202320032 its reverse (23002320212), we get a palindrome (44204640244).

The spelling of 21202320032 in words is "twenty-one billion, two hundred two million, three hundred twenty thousand, thirty-two".