21404322204 has 24 divisors (see below), whose sum is σ = 51665606160. Its totient is φ = 6888747264.

The previous prime is 21404322193. The next prime is 21404322211. The reversal of 21404322204 is 40222340412.

It is a congruent number.

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, 30752989 + ... + 30753684.

It is an arithmetic number, because the mean of its divisors is an integer number (2152733590).

Almost surely, 2^21404322204 is an apocalyptic number.

It is an amenable number.

21404322204 is an abundant number, since it is smaller than the sum of its proper divisors (30261283956).

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

21404322204 is a wasteful number, since it uses less digits than its factorization.

21404322204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61506709 (or 61506707 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 21404322204 its reverse (40222340412), we get a palindrome (61626662616).

The spelling of 21404322204 in words is "twenty-one billion, four hundred four million, three hundred twenty-two thousand, two hundred four".