20886666668888 has 16 divisors (see below), whose sum is σ = 39566237119080. Its totient is φ = 10335670103808.

The previous prime is 20886666668869. The next prime is 20886666668909. The reversal of 20886666668888 is 88886666668802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13457903006 + ... + 13457904557.

Almost surely, 2^{20886666668888} is an apocalyptic number.

It is an amenable number.

20886666668888 is a deficient number, since it is larger than the sum of its proper divisors (18679570450192).

20886666668888 is a wasteful number, since it uses less digits than its factorization.

20886666668888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26915807666 (or 26915807662 counting only the distinct ones).

The product of its (nonzero) digits is 24461180928, while the sum is 86.

Subtracting from 20886666668888 its sum of digits (86), we obtain a palindrome (20886666668802).

The spelling of 20886666668888 in words is "twenty trillion, eight hundred eighty-six billion, six hundred sixty-six million, six hundred sixty-eight thousand, eight hundred eighty-eight".