21134303204 has 48 divisors (see below), whose sum is σ = 45627321600. Its totient is φ = 8364994176.

The previous prime is 21134303159. The next prime is 21134303221. The reversal of 21134303204 is 40230343112.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 21134303204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 547139 + ... + 584490.

It is an arithmetic number, because the mean of its divisors is an integer number (950569200).

Almost surely, 2^21134303204 is an apocalyptic number.

It is an amenable number.

21134303204 is an abundant number, since it is smaller than the sum of its proper divisors (24493018396).

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

21134303204 is a wasteful number, since it uses less digits than its factorization.

21134303204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131692 (or 1131690 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21134303204 its reverse (40230343112), we get a palindrome (61364646316).

The spelling of 21134303204 in words is "twenty-one billion, one hundred thirty-four million, three hundred three thousand, two hundred four".