21130003232 has 96 divisors (see below), whose sum is σ = 46620826560. Its totient is φ = 9363594240.

The previous prime is 21130003201. The next prime is 21130003277. The reversal of 21130003232 is 23230003112.

It is a self number, because there is not a number n which added to its sum of digits gives 21130003232.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1045382 + ... + 1065402.

It is an arithmetic number, because the mean of its divisors is an integer number (485633610).

Almost surely, 2^21130003232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21130003232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23310413280).

21130003232 is an abundant number, since it is smaller than the sum of its proper divisors (25490823328).

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

21130003232 is a wasteful number, since it uses less digits than its factorization.

21130003232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20146 (or 20138 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21130003232 its reverse (23230003112), we get a palindrome (44360006344).

The spelling of 21130003232 in words is "twenty-one billion, one hundred thirty million, three thousand, two hundred thirty-two".