21110000008 has 16 divisors (see below), whose sum is σ = 41664474000. Its totient is φ = 9999473616.

The previous prime is 21110000003. The next prime is 21110000057. The reversal of 21110000008 is 80000001112.

It is not an unprimeable number, because it can be changed into a prime (21110000003) 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, 69440638 + ... + 69440941.

It is an arithmetic number, because the mean of its divisors is an integer number (2604029625).

Almost surely, 2^21110000008 is an apocalyptic number.

It is an amenable number.

21110000008 is a deficient number, since it is larger than the sum of its proper divisors (20554473992).

21110000008 is a wasteful number, since it uses less digits than its factorization.

21110000008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138881604 (or 138881600 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

The spelling of 21110000008 in words is "twenty-one billion, one hundred ten million, eight", and thus it is an aban number.