21040222304 has 48 divisors (see below), whose sum is σ = 41794885440. Its totient is φ = 10425866880.

The previous prime is 21040222271. The next prime is 21040222321. The reversal of 21040222304 is 40322204012.

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, 3598007 + ... + 3603849.

It is an arithmetic number, because the mean of its divisors is an integer number (870726780).

Almost surely, 2^21040222304 is an apocalyptic number.

It is an amenable number.

21040222304 is a deficient number, since it is larger than the sum of its proper divisors (20754663136).

21040222304 is a wasteful number, since it uses less digits than its factorization.

21040222304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6843 (or 6835 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21040222304 its reverse (40322204012), we get a palindrome (61362426316).

The spelling of 21040222304 in words is "twenty-one billion, forty million, two hundred twenty-two thousand, three hundred four".