20989604506696 has 64 divisors (see below), whose sum is σ = 45282929472000. Its totient is φ = 8934512600832.

The previous prime is 20989604506667. The next prime is 20989604506733. The reversal of 20989604506696 is 69660540698902.

It is a happy number.

It is a super-3 number, since 3×20989604506696³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122713185 + ... + 122884111.

It is an arithmetic number, because the mean of its divisors is an integer number (707545773000).

Almost surely, 2^{20989604506696} is an apocalyptic number.

It is an amenable number.

20989604506696 is an abundant number, since it is smaller than the sum of its proper divisors (24293324965304).

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

20989604506696 is a wasteful number, since it uses less digits than its factorization.

20989604506696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185806 (or 185802 counting only the distinct ones).

The product of its (nonzero) digits is 302330880, while the sum is 70.

The spelling of 20989604506696 in words is "twenty trillion, nine hundred eighty-nine billion, six hundred four million, five hundred six thousand, six hundred ninety-six".