21000103232 has 28 divisors (see below), whose sum is σ = 41676963636. Its totient is φ = 10498821120.

The previous prime is 21000103217. The next prime is 21000103237. The reversal of 21000103232 is 23230100012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16698842176 + 4301261056 = 129224^2 + 65584^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000103237) 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, 805148 + ... + 830820.

It is an arithmetic number, because the mean of its divisors is an integer number (1488462987).

Almost surely, 2^21000103232 is an apocalyptic number.

It is an amenable number.

21000103232 is a deficient number, since it is larger than the sum of its proper divisors (20676860404).

21000103232 is a wasteful number, since it uses less digits than its factorization.

21000103232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38466 (or 38456 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21000103232 its reverse (23230100012), we get a palindrome (44230203244).

The spelling of 21000103232 in words is "twenty-one billion, one hundred three thousand, two hundred thirty-two".