21113104204 has 24 divisors (see below), whose sum is σ = 38497006800. Its totient is φ = 10119197760.

The previous prime is 21113104183. The next prime is 21113104241. The reversal of 21113104204 is 40240131112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 638587 + ... + 670834.

It is an arithmetic number, because the mean of its divisors is an integer number (1604041950).

Almost surely, 2^21113104204 is an apocalyptic number.

It is an amenable number.

21113104204 is a deficient number, since it is larger than the sum of its proper divisors (17383902596).

21113104204 is a wasteful number, since it uses less digits than its factorization.

21113104204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309593 (or 1309591 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21113104204 its reverse (40240131112), we get a palindrome (61353235316).

The spelling of 21113104204 in words is "twenty-one billion, one hundred thirteen million, one hundred four thousand, two hundred four".