20617664006 has 4 divisors (see below), whose sum is σ = 30926496012. Its totient is φ = 10308832002.

The previous prime is 20617663991. The next prime is 20617664017. The reversal of 20617664006 is 60046671602.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5154416000 + ... + 5154416003.

It is an arithmetic number, because the mean of its divisors is an integer number (7731624003).

Almost surely, 2^20617664006 is an apocalyptic number.

20617664006 is a deficient number, since it is larger than the sum of its proper divisors (10308832006).

20617664006 is a wasteful number, since it uses less digits than its factorization.

20617664006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10308832005.

The product of its (nonzero) digits is 72576, while the sum is 38.

The spelling of 20617664006 in words is "twenty billion, six hundred seventeen million, six hundred sixty-four thousand, six".