21330330330 has 32 divisors (see below), whose sum is σ = 51283761984. Its totient is φ = 5677980416.

The previous prime is 21330330323. The next prime is 21330330377. The reversal of 21330330330 is 3303303312.

It is a super-5 number, since 5×21330330330⁵ (a number of 53 digits) contains 55555 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21330330297 and 21330330306.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 614559 + ... + 648338.

It is an arithmetic number, because the mean of its divisors is an integer number (1602617562).

Almost surely, 2^21330330330 is an apocalyptic number.

21330330330 is an abundant number, since it is smaller than the sum of its proper divisors (29953431654).

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

21330330330 is a wasteful number, since it uses less digits than its factorization.

21330330330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263470.

The product of its (nonzero) digits is 1458, while the sum is 21.

Adding to 21330330330 its reverse (3303303312), we get a palindrome (24633633642).

The spelling of 21330330330 in words is "twenty-one billion, three hundred thirty million, three hundred thirty thousand, three hundred thirty".