21241328330 has 16 divisors (see below), whose sum is σ = 38259038664. Its totient is φ = 8491054080.

The previous prime is 21241328327. The next prime is 21241328347. The reversal of 21241328330 is 3382314212.

It can be written as a sum of positive squares in 4 ways, for example, as 14539777561 + 6701550769 = 120581^2 + 81863^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21241328293 and 21241328302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 668351 + ... + 699410.

Almost surely, 2^21241328330 is an apocalyptic number.

21241328330 is a deficient number, since it is larger than the sum of its proper divisors (17017710334).

21241328330 is a wasteful number, since it uses less digits than its factorization.

21241328330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369321.

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 21241328330 in words is "twenty-one billion, two hundred forty-one million, three hundred twenty-eight thousand, three hundred thirty".