205022020017 has 8 divisors (see below), whose sum is σ = 273500276896. Its totient is φ = 136612554912.

The previous prime is 205022020013. The next prime is 205022020039. The reversal of 205022020017 is 710020220502.

It is a happy number.

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

It is not a de Polignac number, because 205022020017 - 2² = 205022020013 is a prime.

It is a super-2 number, since 2×205022020017² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205022019975 and 205022020002.

It is not an unprimeable number, because it can be changed into a prime (205022020013) 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, 17190988 + ... + 17202909.

It is an arithmetic number, because the mean of its divisors is an integer number (34187534612).

Almost surely, 2^205022020017 is an apocalyptic number.

It is an amenable number.

205022020017 is a deficient number, since it is larger than the sum of its proper divisors (68478256879).

205022020017 is a wasteful number, since it uses less digits than its factorization.

205022020017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34395887.

The product of its (nonzero) digits is 560, while the sum is 21.

Adding to 205022020017 its reverse (710020220502), we get a palindrome (915042240519).

The spelling of 205022020017 in words is "two hundred five billion, twenty-two million, twenty thousand, seventeen".