20006006605 has 64 divisors (see below), whose sum is σ = 27044075520. Its totient is φ = 14113253376.

The previous prime is 20006006569. The next prime is 20006006617. The reversal of 20006006605 is 50660060002.

It is a cyclic number.

It is not a de Polignac number, because 20006006605 - 2²⁵ = 19972452173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20006006605.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 24308224 + ... + 24309046.

It is an arithmetic number, because the mean of its divisors is an integer number (422563680).

Almost surely, 2^20006006605 is an apocalyptic number.

It is an amenable number.

20006006605 is a deficient number, since it is larger than the sum of its proper divisors (7038068915).

20006006605 is a wasteful number, since it uses less digits than its factorization.

20006006605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 20006006605 its reverse (50660060002), we get a palindrome (70666066607).

The spelling of 20006006605 in words is "twenty billion, six million, six thousand, six hundred five".