20637808009 has 8 divisors (see below), whose sum is σ = 25400379200. Its totient is φ = 16328815056.

The previous prime is 20637808007. The next prime is 20637808031. The reversal of 20637808009 is 90080873602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20637808009 - 2¹ = 20637808007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20637808001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113394459 + ... + 113394640.

It is an arithmetic number, because the mean of its divisors is an integer number (3175047400).

Almost surely, 2^20637808009 is an apocalyptic number.

It is an amenable number.

20637808009 is a deficient number, since it is larger than the sum of its proper divisors (4762571191).

20637808009 is a wasteful number, since it uses less digits than its factorization.

20637808009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226789119.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 20637808009 in words is "twenty billion, six hundred thirty-seven million, eight hundred eight thousand, nine".