21031302332 has 6 divisors (see below), whose sum is σ = 36804779088. Its totient is φ = 10515651164.

The previous prime is 21031302319. The next prime is 21031302337. The reversal of 21031302332 is 23320313012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031302337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2628912788 + ... + 2628912795.

It is an arithmetic number, because the mean of its divisors is an integer number (6134129848).

Almost surely, 2^21031302332 is an apocalyptic number.

It is an amenable number.

21031302332 is a deficient number, since it is larger than the sum of its proper divisors (15773476756).

21031302332 is a wasteful number, since it uses less digits than its factorization.

21031302332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5257825587 (or 5257825585 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21031302332 its reverse (23320313012), we get a palindrome (44351615344).

The spelling of 21031302332 in words is "twenty-one billion, thirty-one million, three hundred two thousand, three hundred thirty-two".