20050120666 has 16 divisors (see below), whose sum is σ = 31049694720. Its totient is φ = 9700313040.

The previous prime is 20050120663. The next prime is 20050120703. The reversal of 20050120666 is 66602105002.

It is not an unprimeable number, because it can be changed into a prime (20050120663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532800 + ... + 569188.

It is an arithmetic number, because the mean of its divisors is an integer number (1940605920).

Almost surely, 2^20050120666 is an apocalyptic number.

20050120666 is a deficient number, since it is larger than the sum of its proper divisors (10999574054).

20050120666 is a wasteful number, since it uses less digits than its factorization.

20050120666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45309.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 20050120666 its reverse (66602105002), we get a palindrome (86652225668).

The spelling of 20050120666 in words is "twenty billion, fifty million, one hundred twenty thousand, six hundred sixty-six".