21000113232 has 80 divisors (see below), whose sum is σ = 62849727360. Its totient is φ = 5917833216.

The previous prime is 21000113221. The next prime is 21000113237. The reversal of 21000113232 is 23231100012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000113237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 403557 + ... + 452612.

It is an arithmetic number, because the mean of its divisors is an integer number (785621592).

Almost surely, 2^21000113232 is an apocalyptic number.

It is an amenable number.

21000113232 is an abundant number, since it is smaller than the sum of its proper divisors (41849614128).

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

21000113232 is a wasteful number, since it uses less digits than its factorization.

21000113232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856260 (or 856254 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21000113232 its reverse (23231100012), we get a palindrome (44231213244).

The spelling of 21000113232 in words is "twenty-one billion, one hundred thirteen thousand, two hundred thirty-two".