21203333304 has 64 divisors (see below), whose sum is σ = 53352691200. Its totient is φ = 7021937664.

The previous prime is 21203333303. The next prime is 21203333321. The reversal of 21203333304 is 40333330212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203333303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8663809 + ... + 8666255.

It is an arithmetic number, because the mean of its divisors is an integer number (833635800).

Almost surely, 2^21203333304 is an apocalyptic number.

21203333304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21203333304 is an abundant number, since it is smaller than the sum of its proper divisors (32149357896).

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

21203333304 is a wasteful number, since it uses less digits than its factorization.

21203333304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4652 (or 4648 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 24.

Adding to 21203333304 its reverse (40333330212), we get a palindrome (61536663516).

The spelling of 21203333304 in words is "twenty-one billion, two hundred three million, three hundred thirty-three thousand, three hundred four".