21321502330 has 8 divisors (see below), whose sum is σ = 38378704212. Its totient is φ = 8528600928.

The previous prime is 21321502309. The next prime is 21321502379. The reversal of 21321502330 is 3320512312.

It can be written as a sum of positive squares in 2 ways, for example, as 19312938841 + 2008563489 = 138971^2 + 44817^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 1066075107 + ... + 1066075126.

Almost surely, 2^21321502330 is an apocalyptic number.

21321502330 is a deficient number, since it is larger than the sum of its proper divisors (17057201882).

21321502330 is a wasteful number, since it uses less digits than its factorization.

21321502330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132150240.

The product of its (nonzero) digits is 1080, while the sum is 22.

The spelling of 21321502330 in words is "twenty-one billion, three hundred twenty-one million, five hundred two thousand, three hundred thirty".