2020105517 has 4 divisors (see below), whose sum is σ = 2126426880. Its totient is φ = 1913784156.

The previous prime is 2020105513. The next prime is 2020105559. The reversal of 2020105517 is 7155010202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7155010202 = 2 ⋅3577505101.

It is a cyclic number.

It is not a de Polignac number, because 2020105517 - 2² = 2020105513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2020105492 and 2020105501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020105511) 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, 53160653 + ... + 53160690.

It is an arithmetic number, because the mean of its divisors is an integer number (531606720).

Almost surely, 2^2020105517 is an apocalyptic number.

It is an amenable number.

2020105517 is a deficient number, since it is larger than the sum of its proper divisors (106321363).

2020105517 is a wasteful number, since it uses less digits than its factorization.

2020105517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106321362.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 2020105517 is about 44945.5839543775. The cubic root of 2020105517 is about 1264.1288751672.

Adding to 2020105517 its reverse (7155010202), we get a palindrome (9175115719).

The spelling of 2020105517 in words is "two billion, twenty million, one hundred five thousand, five hundred seventeen".