20688021486814 has 16 divisors (see below), whose sum is σ = 33853701694320. Its totient is φ = 9403486234560.

The previous prime is 20688021486779. The next prime is 20688021486829. The reversal of 20688021486814 is 41868412088602.

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, 6666639 + ... + 9263914.

It is an arithmetic number, because the mean of its divisors is an integer number (2115856355895).

Almost surely, 2^{20688021486814} is an apocalyptic number.

20688021486814 is a deficient number, since it is larger than the sum of its proper divisors (13165680207506).

20688021486814 is a wasteful number, since it uses less digits than its factorization.

20688021486814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15989595.

The product of its (nonzero) digits is 9437184, while the sum is 58.

The spelling of 20688021486814 in words is "twenty trillion, six hundred eighty-eight billion, twenty-one million, four hundred eighty-six thousand, eight hundred fourteen".