21003200032 has 12 divisors (see below), whose sum is σ = 41350050126. Its totient is φ = 10501600000.

The previous prime is 21003200021. The next prime is 21003200063. The reversal of 21003200032 is 23000230012.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21002965776 + 234256 = 144924^2 + 484^2 .

It is a super-2 number, since 2×21003200032² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003199985 and 21003200021.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328174969 + ... + 328175032.

Almost surely, 2^21003200032 is an apocalyptic number.

It is an amenable number.

21003200032 is a deficient number, since it is larger than the sum of its proper divisors (20346850094).

21003200032 is an equidigital number, since it uses as much as digits as its factorization.

21003200032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656350011 (or 656350003 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 21003200032 its reverse (23000230012), we get a palindrome (44003430044).

The spelling of 21003200032 in words is "twenty-one billion, three million, two hundred thousand, thirty-two".