20665032006 has 32 divisors (see below), whose sum is σ = 43767682560. Its totient is φ = 6482193536.

The previous prime is 20665031911. The next prime is 20665032007. The reversal of 20665032006 is 60023056602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20665032007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1060015 + ... + 1079333.

It is an arithmetic number, because the mean of its divisors is an integer number (1367740080).

Almost surely, 2^20665032006 is an apocalyptic number.

20665032006 is an abundant number, since it is smaller than the sum of its proper divisors (23102650554).

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

20665032006 is a wasteful number, since it uses less digits than its factorization.

20665032006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29828.

The product of its (nonzero) digits is 12960, while the sum is 30.

Adding to 20665032006 its reverse (60023056602), we get a palindrome (80688088608).

The spelling of 20665032006 in words is "twenty billion, six hundred sixty-five million, thirty-two thousand, six".