21116153175868 has 24 divisors (see below), whose sum is σ = 39129811826112. Its totient is φ = 9936296530944.

The previous prime is 21116153175847. The next prime is 21116153175913. The reversal of 21116153175868 is 86857135161112.

It is a congruent number.

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, 10248580 + ... + 12135307.

It is an arithmetic number, because the mean of its divisors is an integer number (1630408826088).

Almost surely, 2^{21116153175868} is an apocalyptic number.

It is an amenable number.

21116153175868 is a deficient number, since it is larger than the sum of its proper divisors (18013658650244).

21116153175868 is a wasteful number, since it uses less digits than its factorization.

21116153175868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22397781 (or 22397779 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 55.

The spelling of 21116153175868 in words is "twenty-one trillion, one hundred sixteen billion, one hundred fifty-three million, one hundred seventy-five thousand, eight hundred sixty-eight".