21313030332 has 24 divisors (see below), whose sum is σ = 54251350272. Its totient is φ = 6458494000.

The previous prime is 21313030241. The next prime is 21313030351. The reversal of 21313030332 is 23303031312.

It is a junction number, because it is equal to n+sod(n) for n = 21313030299 and 21313030308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80731044 + ... + 80731307.

It is an arithmetic number, because the mean of its divisors is an integer number (2260472928).

Almost surely, 2^21313030332 is an apocalyptic number.

21313030332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21313030332 is an abundant number, since it is smaller than the sum of its proper divisors (32938319940).

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

21313030332 is a wasteful number, since it uses less digits than its factorization.

21313030332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161462369 (or 161462367 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21313030332 its reverse (23303031312), we get a palindrome (44616061644).

The spelling of 21313030332 in words is "twenty-one billion, three hundred thirteen million, thirty thousand, three hundred thirty-two".