21044025304 has 16 divisors (see below), whose sum is σ = 39459777120. Its totient is φ = 10521418080.

The previous prime is 21044025257. The next prime is 21044025311. The reversal of 21044025304 is 40352044012.

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 3 ways as a sum of consecutive naturals, for example, 100209 + ... + 228319.

It is an arithmetic number, because the mean of its divisors is an integer number (2466236070).

Almost surely, 2^21044025304 is an apocalyptic number.

It is an amenable number.

21044025304 is a deficient number, since it is larger than the sum of its proper divisors (18415751816).

21044025304 is a wasteful number, since it uses less digits than its factorization.

21044025304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148650 (or 148646 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 21044025304 its reverse (40352044012), we get a palindrome (61396069316).

The spelling of 21044025304 in words is "twenty-one billion, forty-four million, twenty-five thousand, three hundred four".