20390648606 has 32 divisors (see below), whose sum is σ = 33557004000. Its totient is φ = 9249472512.

The previous prime is 20390648599. The next prime is 20390648647. The reversal of 20390648606 is 60684609302.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 593630 + ... + 627038.

It is an arithmetic number, because the mean of its divisors is an integer number (1048656375).

Almost surely, 2^20390648606 is an apocalyptic number.

20390648606 is a deficient number, since it is larger than the sum of its proper divisors (13166355394).

20390648606 is a wasteful number, since it uses less digits than its factorization.

20390648606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34076.

The product of its (nonzero) digits is 373248, while the sum is 44.

The spelling of 20390648606 in words is "twenty billion, three hundred ninety million, six hundred forty-eight thousand, six hundred six".