20017103206550 has 24 divisors (see below), whose sum is σ = 37236033599952. Its totient is φ = 8005933404000.

The previous prime is 20017103206549. The next prime is 20017103206571. The reversal of 20017103206550 is 5560230171002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22251506 + ... + 23133605.

It is an arithmetic number, because the mean of its divisors is an integer number (1551501399998).

Almost surely, 2^{20017103206550} is an apocalyptic number.

20017103206550 is a deficient number, since it is larger than the sum of its proper divisors (17218930393402).

20017103206550 is a wasteful number, since it uses less digits than its factorization.

20017103206550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45393944 (or 45393939 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

Adding to 20017103206550 its reverse (5560230171002), we get a palindrome (25577333377552).

The spelling of 20017103206550 in words is "twenty trillion, seventeen billion, one hundred three million, two hundred six thousand, five hundred fifty".