20117115021205 has 8 divisors (see below), whose sum is σ = 25190126635392. Its totient is φ = 15393966277008.

The previous prime is 20117115021181. The next prime is 20117115021257. The reversal of 20117115021205 is 50212051171102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20117115021205 - 2⁷ = 20117115021077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87465717369 + ... + 87465717598.

It is an arithmetic number, because the mean of its divisors is an integer number (3148765829424).

Almost surely, 2^{20117115021205} is an apocalyptic number.

It is an amenable number.

20117115021205 is a deficient number, since it is larger than the sum of its proper divisors (5073011614187).

20117115021205 is a wasteful number, since it uses less digits than its factorization.

20117115021205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174931434995.

The product of its (nonzero) digits is 1400, while the sum is 28.

Adding to 20117115021205 its reverse (50212051171102), we get a palindrome (70329166192307).

The spelling of 20117115021205 in words is "twenty trillion, one hundred seventeen billion, one hundred fifteen million, twenty-one thousand, two hundred five".