21033030320 has 40 divisors (see below), whose sum is σ = 50039054736. Its totient is φ = 8217554688.

The previous prime is 21033030313. The next prime is 21033030331. The reversal of 21033030320 is 2303033012.

It is a tau number, because it is divible by the number of its divisors (40).

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, 3053687 + ... + 3060566.

Almost surely, 2^21033030320 is an apocalyptic number.

21033030320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21033030320 is an abundant number, since it is smaller than the sum of its proper divisors (29006024416).

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

21033030320 is a wasteful number, since it uses less digits than its factorization.

21033030320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6114309 (or 6114303 counting only the distinct ones).

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

Adding to 21033030320 its reverse (2303033012), we get a palindrome (23336063332).

The spelling of 21033030320 in words is "twenty-one billion, thirty-three million, thirty thousand, three hundred twenty".