21113330204 has 24 divisors (see below), whose sum is σ = 37087953840. Its totient is φ = 10516827776.

The previous prime is 21113330191. The next prime is 21113330207. The reversal of 21113330204 is 40203331112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113330207) 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 7 ways as a sum of consecutive naturals, for example, 1699664 + ... + 1712040.

It is an arithmetic number, because the mean of its divisors is an integer number (1545331410).

Almost surely, 2^21113330204 is an apocalyptic number.

It is an amenable number.

21113330204 is a deficient number, since it is larger than the sum of its proper divisors (15974623636).

21113330204 is a wasteful number, since it uses less digits than its factorization.

21113330204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13957 (or 13955 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21113330204 its reverse (40203331112), we get a palindrome (61316661316).

The spelling of 21113330204 in words is "twenty-one billion, one hundred thirteen million, three hundred thirty thousand, two hundred four".