20155007741017 has 4 divisors (see below), whose sum is σ = 20157896526516. Its totient is φ = 20152118955520.

The previous prime is 20155007741009. The next prime is 20155007741047. The reversal of 20155007741017 is 71014770055102.

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 1835743170816 + 18319264570201 = 1354896^2 + 4280101^2 .

It is a cyclic number.

It is not a de Polignac number, because 20155007741017 - 2³ = 20155007741009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20155007741047) 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, 1444382284 + ... + 1444396237.

It is an arithmetic number, because the mean of its divisors is an integer number (5039474131629).

Almost surely, 2^{20155007741017} is an apocalyptic number.

It is an amenable number.

20155007741017 is a deficient number, since it is larger than the sum of its proper divisors (2888785499).

20155007741017 is an equidigital number, since it uses as much as digits as its factorization.

20155007741017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888785498.

The product of its (nonzero) digits is 68600, while the sum is 40.

Adding to 20155007741017 its reverse (71014770055102), we get a palindrome (91169777796119).

The spelling of 20155007741017 in words is "twenty trillion, one hundred fifty-five billion, seven million, seven hundred forty-one thousand, seventeen".