205303053424021 has 16 divisors (see below), whose sum is σ = 248474468833920. Its totient is φ = 165595616778240.

The previous prime is 205303053424013. The next prime is 205303053424033. The reversal of 205303053424021 is 120424350303502.

It is a cyclic number.

It is not a de Polignac number, because 205303053424021 - 2³ = 205303053424013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205303053422021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139968156 + ... + 141427333.

It is an arithmetic number, because the mean of its divisors is an integer number (15529654302120).

Almost surely, 2^{205303053424021} is an apocalyptic number.

It is an amenable number.

205303053424021 is a deficient number, since it is larger than the sum of its proper divisors (43171415409899).

205303053424021 is a wasteful number, since it uses less digits than its factorization.

205303053424021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281401644.

The product of its (nonzero) digits is 86400, while the sum is 34.

The spelling of 205303053424021 in words is "two hundred five trillion, three hundred three billion, fifty-three million, four hundred twenty-four thousand, twenty-one".