21680311048 has 16 divisors (see below), whose sum is σ = 44346090960. Its totient is φ = 9854686800.

The previous prime is 21680311031. The next prime is 21680311087. The reversal of 21680311048 is 84011308612.

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, 123183498 + ... + 123183673.

It is an arithmetic number, because the mean of its divisors is an integer number (2771630685).

Almost surely, 2^21680311048 is an apocalyptic number.

It is an amenable number.

21680311048 is an abundant number, since it is smaller than the sum of its proper divisors (22665779912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21680311048 is a wasteful number, since it uses less digits than its factorization.

21680311048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246367188 (or 246367184 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The spelling of 21680311048 in words is "twenty-one billion, six hundred eighty million, three hundred eleven thousand, forty-eight".