20617170205202 has 16 divisors (see below), whose sum is σ = 32270508043200. Its totient is φ = 9860338487472.

The previous prime is 20617170205169. The next prime is 20617170205231. The reversal of 20617170205202 is 20250207171602.

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 7 ways as a sum of consecutive naturals, for example, 9813773 + ... + 11727935.

It is an arithmetic number, because the mean of its divisors is an integer number (2016906752700).

Almost surely, 2^{20617170205202} is an apocalyptic number.

20617170205202 is a deficient number, since it is larger than the sum of its proper divisors (11653337837998).

20617170205202 is a wasteful number, since it uses less digits than its factorization.

20617170205202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2148337.

The product of its (nonzero) digits is 23520, while the sum is 35.

Adding to 20617170205202 its reverse (20250207171602), we get a palindrome (40867377376804).

The spelling of 20617170205202 in words is "twenty trillion, six hundred seventeen billion, one hundred seventy million, two hundred five thousand, two hundred two".