20350320205 has 4 divisors (see below), whose sum is σ = 24420384252. Its totient is φ = 16280256160.

The previous prime is 20350320181. The next prime is 20350320247. The reversal of 20350320205 is 50202305302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50202305302 = 2 ⋅25101152651.

It can be written as a sum of positive squares in 2 ways, for example, as 4971096036 + 15379224169 = 70506^2 + 124013^2 .

It is not a de Polignac number, because 20350320205 - 2¹⁵ = 20350287437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2035032016 + ... + 2035032025.

It is an arithmetic number, because the mean of its divisors is an integer number (6105096063).

Almost surely, 2^20350320205 is an apocalyptic number.

It is an amenable number.

20350320205 is a deficient number, since it is larger than the sum of its proper divisors (4070064047).

20350320205 is an equidigital number, since it uses as much as digits as its factorization.

20350320205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4070064046.

The product of its (nonzero) digits is 1800, while the sum is 22.

Adding to 20350320205 its reverse (50202305302), we get a palindrome (70552625507).

The spelling of 20350320205 in words is "twenty billion, three hundred fifty million, three hundred twenty thousand, two hundred five".