21110043304 has 32 divisors (see below), whose sum is σ = 45326520000. Its totient is φ = 9029018880.

The previous prime is 21110043289. The next prime is 21110043319. The reversal of 21110043304 is 40334001112.

It is an interprime number because it is at equal distance from previous prime (21110043289) and next prime (21110043319).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349777 + ... + 405664.

It is an arithmetic number, because the mean of its divisors is an integer number (1416453750).

Almost surely, 2^21110043304 is an apocalyptic number.

It is an amenable number.

21110043304 is an abundant number, since it is smaller than the sum of its proper divisors (24216476696).

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

21110043304 is a wasteful number, since it uses less digits than its factorization.

21110043304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755953 (or 755949 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21110043304 its reverse (40334001112), we get a palindrome (61444044416).

The spelling of 21110043304 in words is "twenty-one billion, one hundred ten million, forty-three thousand, three hundred four".