21280866088 has 16 divisors (see below), whose sum is σ = 40165875360. Its totient is φ = 10569966000.

The previous prime is 21280866083. The next prime is 21280866133. The reversal of 21280866088 is 88066808212.

It is a super-3 number, since 3×21280866088³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21280866083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8807098 + ... + 8809513.

It is an arithmetic number, because the mean of its divisors is an integer number (2510367210).

Almost surely, 2^21280866088 is an apocalyptic number.

It is an amenable number.

21280866088 is a deficient number, since it is larger than the sum of its proper divisors (18885009272).

21280866088 is a wasteful number, since it uses less digits than its factorization.

21280866088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17616768 (or 17616764 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 49.

The spelling of 21280866088 in words is "twenty-one billion, two hundred eighty million, eight hundred sixty-six thousand, eighty-eight".