20215201620017 has 8 divisors (see below), whose sum is σ = 20796218808000. Its totient is φ = 19636008663024.

The previous prime is 20215201620011. The next prime is 20215201620067. The reversal of 20215201620017 is 71002610251202.

It is a happy number.

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 20215201620017 - 2⁸ = 20215201619761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20215201620011) 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, 456035267 + ... + 456079592.

It is an arithmetic number, because the mean of its divisors is an integer number (2599527351000).

Almost surely, 2^{20215201620017} is an apocalyptic number.

It is an amenable number.

20215201620017 is a deficient number, since it is larger than the sum of its proper divisors (581017187983).

20215201620017 is an equidigital number, since it uses as much as digits as its factorization.

20215201620017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912115495.

The product of its (nonzero) digits is 3360, while the sum is 29.

Adding to 20215201620017 its reverse (71002610251202), we get a palindrome (91217811871219).

The spelling of 20215201620017 in words is "twenty trillion, two hundred fifteen billion, two hundred one million, six hundred twenty thousand, seventeen".