20401617104417 has 4 divisors (see below), whose sum is σ = 20401797959316. Its totient is φ = 20401436249520.

The previous prime is 20401617104353. The next prime is 20401617104483. The reversal of 20401617104417 is 71440171610402.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2081299614241 + 18320317490176 = 1442671^2 + 4280224^2 .

It is a cyclic number.

It is not a de Polignac number, because 20401617104417 - 2⁶ = 20401617104353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20401617104497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90258134 + ... + 90483887.

It is an arithmetic number, because the mean of its divisors is an integer number (5100449489829).

Almost surely, 2^{20401617104417} is an apocalyptic number.

It is an amenable number.

20401617104417 is a deficient number, since it is larger than the sum of its proper divisors (180854899).

20401617104417 is a wasteful number, since it uses less digits than its factorization.

20401617104417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180854898.

The product of its (nonzero) digits is 37632, while the sum is 38.

Adding to 20401617104417 its reverse (71440171610402), we get a palindrome (91841788714819).

The spelling of 20401617104417 in words is "twenty trillion, four hundred one billion, six hundred seventeen million, one hundred four thousand, four hundred seventeen".