20868088668 has 24 divisors (see below), whose sum is σ = 55648236672. Its totient is φ = 5962311024.

The previous prime is 20868088643. The next prime is 20868088691. The reversal of 20868088668 is 86688086802.

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, 124214730 + ... + 124214897.

It is an arithmetic number, because the mean of its divisors is an integer number (2318676528).

Almost surely, 2^20868088668 is an apocalyptic number.

20868088668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20868088668 is an abundant number, since it is smaller than the sum of its proper divisors (34780148004).

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

20868088668 is a wasteful number, since it uses less digits than its factorization.

20868088668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248429641 (or 248429639 counting only the distinct ones).

The product of its (nonzero) digits is 14155776, while the sum is 60.

The spelling of 20868088668 in words is "twenty billion, eight hundred sixty-eight million, eighty-eight thousand, six hundred sixty-eight".