21033020330 has 128 divisors (see below), whose sum is σ = 49044787200. Its totient is φ = 6320526336.

The previous prime is 21033020321. The next prime is 21033020339. The reversal of 21033020330 is 3302033012.

It is an interprime number because it is at equal distance from previous prime (21033020321) and next prime (21033020339).

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a junction number, because it is equal to n+sod(n) for n = 21033020299 and 21033020308.

It is not an unprimeable number, because it can be changed into a prime (21033020339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1326107 + ... + 1341873.

It is an arithmetic number, because the mean of its divisors is an integer number (383162400).

Almost surely, 2^21033020330 is an apocalyptic number.

21033020330 is an abundant number, since it is smaller than the sum of its proper divisors (28011766870).

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

21033020330 is a wasteful number, since it uses less digits than its factorization.

21033020330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15876.

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

Adding to 21033020330 its reverse (3302033012), we get a palindrome (24335053342).

The spelling of 21033020330 in words is "twenty-one billion, thirty-three million, twenty thousand, three hundred thirty".