21113330642 has 64 divisors (see below), whose sum is σ = 35103974400. Its totient is φ = 9480253440.

The previous prime is 21113330639. The next prime is 21113330663. The reversal of 21113330642 is 24603331112.

It is a super-2 number, since 2×21113330642² (a number of 21 digits) contains 22 as substring.

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, 32038109 + ... + 32038767.

It is an arithmetic number, because the mean of its divisors is an integer number (548499600).

Almost surely, 2^21113330642 is an apocalyptic number.

21113330642 is a deficient number, since it is larger than the sum of its proper divisors (13990643758).

21113330642 is a wasteful number, since it uses less digits than its factorization.

21113330642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 21113330642 its reverse (24603331112), we get a palindrome (45716661754).

The spelling of 21113330642 in words is "twenty-one billion, one hundred thirteen million, three hundred thirty thousand, six hundred forty-two".