20604044066 has 4 divisors (see below), whose sum is σ = 30906066102. Its totient is φ = 10302022032.

The previous prime is 20604044051. The next prime is 20604044143. The reversal of 20604044066 is 66044040602.

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

It can be written as a sum of positive squares in only one way, i.e., 20339038225 + 265005841 = 142615^2 + 16279^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5151011015 + ... + 5151011018.

Almost surely, 2^20604044066 is an apocalyptic number.

20604044066 is a deficient number, since it is larger than the sum of its proper divisors (10302022036).

20604044066 is a wasteful number, since it uses less digits than its factorization.

20604044066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10302022035.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 20604044066 its reverse (66044040602), we get a palindrome (86648084668).

The spelling of 20604044066 in words is "twenty billion, six hundred four million, forty-four thousand, sixty-six".