21033330030 has 192 divisors, whose sum is σ = 61469591040. Its totient is φ = 4964053248.

The previous prime is 21033330013. The next prime is 21033330041. The reversal of 21033330030 is 3003333012.

21033330030 is a `hidden beast` number, since 2 + 1 + 0 + 333 + 300 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21033329985 and 21033330012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1684972 + ... + 1697408.

It is an arithmetic number, because the mean of its divisors is an integer number (320154120).

Almost surely, 2^21033330030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21033330030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30734795520).

21033330030 is an abundant number, since it is smaller than the sum of its proper divisors (40436261010).

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

21033330030 is a wasteful number, since it uses less digits than its factorization.

21033330030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12535 (or 12532 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 18.

Adding to 21033330030 its reverse (3003333012), we get a palindrome (24036663042).

The spelling of 21033330030 in words is "twenty-one billion, thirty-three million, three hundred thirty thousand, thirty".