21010304330 has 16 divisors (see below), whose sum is σ = 37821773664. Its totient is φ = 8403404880.

The previous prime is 21010304323. The next prime is 21010304353. The reversal of 21010304330 is 3340301012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21010304299 and 21010304308.

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, 42809 + ... + 209411.

It is an arithmetic number, because the mean of its divisors is an integer number (2363860854).

Almost surely, 2^21010304330 is an apocalyptic number.

21010304330 is a deficient number, since it is larger than the sum of its proper divisors (16811469334).

21010304330 is a wasteful number, since it uses less digits than its factorization.

21010304330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179221.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21010304330 its reverse (3340301012), we get a palindrome (24350605342).

The spelling of 21010304330 in words is "twenty-one billion, ten million, three hundred four thousand, three hundred thirty".