21668960278088 has 32 divisors (see below), whose sum is σ = 41940500448000. Its totient is φ = 10484836447680.

The previous prime is 21668960278003. The next prime is 21668960278109. The reversal of 21668960278088 is 88087206986612.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18696878 + ... + 19821986.

It is an arithmetic number, because the mean of its divisors is an integer number (1310640639000).

Almost surely, 2^{21668960278088} is an apocalyptic number.

It is an amenable number.

21668960278088 is a deficient number, since it is larger than the sum of its proper divisors (20271540169912).

21668960278088 is a wasteful number, since it uses less digits than its factorization.

21668960278088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202805 (or 1202801 counting only the distinct ones).

The product of its (nonzero) digits is 222953472, while the sum is 71.

The spelling of 21668960278088 in words is "twenty-one trillion, six hundred sixty-eight billion, nine hundred sixty million, two hundred seventy-eight thousand, eighty-eight".