21023210332 has 12 divisors (see below), whose sum is σ = 36828514296. Its totient is φ = 10500777680.

The previous prime is 21023210287. The next prime is 21023210333. The reversal of 21023210332 is 23301232012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023210333) 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, 2702503 + ... + 2710270.

It is an arithmetic number, because the mean of its divisors is an integer number (3069042858).

Almost surely, 2^21023210332 is an apocalyptic number.

It is an amenable number.

21023210332 is a deficient number, since it is larger than the sum of its proper divisors (15805303964).

21023210332 is a wasteful number, since it uses less digits than its factorization.

21023210332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5413748 (or 5413746 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21023210332 its reverse (23301232012), we get a palindrome (44324442344).

The spelling of 21023210332 in words is "twenty-one billion, twenty-three million, two hundred ten thousand, three hundred thirty-two".