205103650450 has 12 divisors (see below), whose sum is σ = 381492789930. Its totient is φ = 82041460160.

The previous prime is 205103650417. The next prime is 205103650457. The reversal of 205103650450 is 54056301502.

It can be written as a sum of positive squares in 3 ways, for example, as 85707832081 + 119395818369 = 292759^2 + 345537^2 .

It is not an unprimeable number, because it can be changed into a prime (205103650457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2051036455 + ... + 2051036554.

Almost surely, 2^205103650450 is an apocalyptic number.

205103650450 is a deficient number, since it is larger than the sum of its proper divisors (176389139480).

205103650450 is a wasteful number, since it uses less digits than its factorization.

205103650450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4102073021 (or 4102073016 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 205103650450 its reverse (54056301502), we get a palindrome (259159951952).

The spelling of 205103650450 in words is "two hundred five billion, one hundred three million, six hundred fifty thousand, four hundred fifty".