21320113033232 has 20 divisors (see below), whose sum is σ = 44485235848620. Its totient is φ = 9840052169088.

The previous prime is 21320113033223. The next prime is 21320113033237. The reversal of 21320113033232 is 23233031102312.

It can be written as a sum of positive squares in 2 ways, for example, as 2543629455376 + 18776483577856 = 1594876^2 + 4333184^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (21320113033237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51250271507 + ... + 51250271922.

It is an arithmetic number, because the mean of its divisors is an integer number (2224261792431).

Almost surely, 2^{21320113033232} is an apocalyptic number.

It is an amenable number.

21320113033232 is an abundant number, since it is smaller than the sum of its proper divisors (23165122815388).

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

21320113033232 is a wasteful number, since it uses less digits than its factorization.

21320113033232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102500543450 (or 102500543444 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 21320113033232 its reverse (23233031102312), we get a palindrome (44553144135544).

The spelling of 21320113033232 in words is "twenty-one trillion, three hundred twenty billion, one hundred thirteen million, thirty-three thousand, two hundred thirty-two".