21044034204 has 24 divisors (see below), whose sum is σ = 49306499088. Its totient is φ = 6985570560.

The previous prime is 21044034181. The next prime is 21044034229. The reversal of 21044034204 is 40243044012.

It is a happy number.

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, 3635427 + ... + 3641210.

It is an arithmetic number, because the mean of its divisors is an integer number (2054437462).

Almost surely, 2^21044034204 is an apocalyptic number.

It is an amenable number.

21044034204 is an abundant number, since it is smaller than the sum of its proper divisors (28262464884).

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

21044034204 is a wasteful number, since it uses less digits than its factorization.

21044034204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7276885 (or 7276883 counting only the distinct ones).

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

Adding to 21044034204 its reverse (40243044012), we get a palindrome (61287078216).

The spelling of 21044034204 in words is "twenty-one billion, forty-four million, thirty-four thousand, two hundred four".