21000332330 has 8 divisors (see below), whose sum is σ = 37800598212. Its totient is φ = 8400132928.

The previous prime is 21000332317. The next prime is 21000332333. The reversal of 21000332330 is 3323300012.

It can be written as a sum of positive squares in 2 ways, for example, as 20342461129 + 657871201 = 142627^2 + 25649^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21000332299 and 21000332308.

It is not an unprimeable number, because it can be changed into a prime (21000332333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050016607 + ... + 1050016626.

Almost surely, 2^21000332330 is an apocalyptic number.

21000332330 is a deficient number, since it is larger than the sum of its proper divisors (16800265882).

21000332330 is a wasteful number, since it uses less digits than its factorization.

21000332330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100033240.

The product of its (nonzero) digits is 324, while the sum is 17.

Adding to 21000332330 its reverse (3323300012), we get a palindrome (24323632342).

The spelling of 21000332330 in words is "twenty-one billion, three hundred thirty-two thousand, three hundred thirty".