21204002330 has 64 divisors (see below), whose sum is σ = 44495861760. Its totient is φ = 7124673600.

The previous prime is 21204002327. The next prime is 21204002357. The reversal of 21204002330 is 3320040212.

It is a junction number, because it is equal to n+sod(n) for n = 21204002299 and 21204002308.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1359275 + ... + 1374785.

It is an arithmetic number, because the mean of its divisors is an integer number (695247840).

Almost surely, 2^21204002330 is an apocalyptic number.

21204002330 is an abundant number, since it is smaller than the sum of its proper divisors (23291859430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21204002330 is a wasteful number, since it uses less digits than its factorization.

21204002330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15915.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 21204002330 its reverse (3320040212), we get a palindrome (24524042542).

The spelling of 21204002330 in words is "twenty-one billion, two hundred four million, two thousand, three hundred thirty".