21113330030 has 64 divisors (see below), whose sum is σ = 43530213888. Its totient is φ = 7304048640.

The previous prime is 21113329999. The next prime is 21113330059. The reversal of 21113330030 is 3003331112.

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 = 21113329990 and 21113330008.

It is a congruent number.

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, 471410 + ... + 514250.

It is an arithmetic number, because the mean of its divisors is an integer number (680159592).

Almost surely, 2^21113330030 is an apocalyptic number.

21113330030 is an abundant number, since it is smaller than the sum of its proper divisors (22416883858).

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

21113330030 is a wasteful number, since it uses less digits than its factorization.

21113330030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43101.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 21113330030 its reverse (3003331112), we get a palindrome (24116661142).

The spelling of 21113330030 in words is "twenty-one billion, one hundred thirteen million, three hundred thirty thousand, thirty".