21331000324 has 12 divisors (see below), whose sum is σ = 37579783500. Its totient is φ = 10593919328.

The previous prime is 21331000309. The next prime is 21331000333. The reversal of 21331000324 is 42300013312.

It can be written as a sum of positive squares in 2 ways, for example, as 1943222724 + 19387777600 = 44082^2 + 139240^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17894539 + ... + 17895730.

It is an arithmetic number, because the mean of its divisors is an integer number (3131648625).

Almost surely, 2^21331000324 is an apocalyptic number.

It is an amenable number.

21331000324 is a deficient number, since it is larger than the sum of its proper divisors (16248783176).

21331000324 is a wasteful number, since it uses less digits than its factorization.

21331000324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35790422 (or 35790420 counting only the distinct ones).

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

Adding to 21331000324 its reverse (42300013312), we get a palindrome (63631013636).

The spelling of 21331000324 in words is "twenty-one billion, three hundred thirty-one million, three hundred twenty-four", and thus it is an aban number.