21306848996 has 12 divisors (see below), whose sum is σ = 37351611948. Its totient is φ = 10634959872.

The previous prime is 21306848987. The next prime is 21306849029. The reversal of 21306848996 is 69984860312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17658688996 + 3648160000 = 132886^2 + 60400^2 .

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, 4613561 + ... + 4618176.

It is an arithmetic number, because the mean of its divisors is an integer number (3112634329).

Almost surely, 2^21306848996 is an apocalyptic number.

It is an amenable number.

21306848996 is a deficient number, since it is larger than the sum of its proper divisors (16044762952).

21306848996 is a wasteful number, since it uses less digits than its factorization.

21306848996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9232318 (or 9232316 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 56.

The spelling of 21306848996 in words is "twenty-one billion, three hundred six million, eight hundred forty-eight thousand, nine hundred ninety-six".