20001311017 has 4 divisors (see below), whose sum is σ = 20015270100. Its totient is φ = 19987351936.

The previous prime is 20001311009. The next prime is 20001311069. The reversal of 20001311017 is 71011310002.

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 10196152576 + 9805158441 = 100976^2 + 99021^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001311017 - 2³ = 20001311009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001311717) 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, 6977392 + ... + 6980257.

It is an arithmetic number, because the mean of its divisors is an integer number (5003817525).

Almost surely, 2^20001311017 is an apocalyptic number.

It is an amenable number.

20001311017 is a deficient number, since it is larger than the sum of its proper divisors (13959083).

20001311017 is a wasteful number, since it uses less digits than its factorization.

20001311017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13959082.

The product of its (nonzero) digits is 42, while the sum is 16.

Adding to 20001311017 its reverse (71011310002), we get a palindrome (91012621019).

The spelling of 20001311017 in words is "twenty billion, one million, three hundred eleven thousand, seventeen".