21280974440968 has 64 divisors (see below), whose sum is σ = 43689409758720. Its totient is φ = 9637590950400.

The previous prime is 21280974440927. The next prime is 21280974440987. The reversal of 21280974440968 is 86904447908212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226387305 + ... + 226481287.

It is an arithmetic number, because the mean of its divisors is an integer number (682647027480).

Almost surely, 2^{21280974440968} is an apocalyptic number.

It is an amenable number.

21280974440968 is an abundant number, since it is smaller than the sum of its proper divisors (22408435317752).

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

21280974440968 is a wasteful number, since it uses less digits than its factorization.

21280974440968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103438 (or 103434 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 64.

The spelling of 21280974440968 in words is "twenty-one trillion, two hundred eighty billion, nine hundred seventy-four million, four hundred forty thousand, nine hundred sixty-eight".