204605986903 has 2 divisors, whose sum is σ = 204605986904. Its totient is φ = 204605986902.

The previous prime is 204605986859. The next prime is 204605987099. The reversal of 204605986903 is 309689506402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204605986903 - 2²¹ = 204603889751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204605986003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102302993451 + 102302993452.

It is an arithmetic number, because the mean of its divisors is an integer number (102302993452).

Almost surely, 2^204605986903 is an apocalyptic number.

204605986903 is a deficient number, since it is larger than the sum of its proper divisors (1).

204605986903 is an equidigital number, since it uses as much as digits as its factorization.

204605986903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2799360, while the sum is 52.

The spelling of 204605986903 in words is "two hundred four billion, six hundred five million, nine hundred eighty-six thousand, nine hundred three".