21359626928 has 20 divisors (see below), whose sum is σ = 41638173528. Its totient is φ = 10614291840.

The previous prime is 21359626927. The next prime is 21359626943. The reversal of 21359626928 is 82962695312.

It is a self number, because there is not a number n which added to its sum of digits gives 21359626928.

It is not an unprimeable number, because it can be changed into a prime (21359626927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4092413 + ... + 4097628.

Almost surely, 2^21359626928 is an apocalyptic number.

It is an amenable number.

21359626928 is a deficient number, since it is larger than the sum of its proper divisors (20278546600).

21359626928 is a wasteful number, since it uses less digits than its factorization.

21359626928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8190212 (or 8190206 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 53.

The spelling of 21359626928 in words is "twenty-one billion, three hundred fifty-nine million, six hundred twenty-six thousand, nine hundred twenty-eight".