204520145087 has 2 divisors, whose sum is σ = 204520145088. Its totient is φ = 204520145086.

The previous prime is 204520145029. The next prime is 204520145099. The reversal of 204520145087 is 780541025402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204520145087 - 2²⁰ = 204519096511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204520145087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204520145887) 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, 102260072543 + 102260072544.

It is an arithmetic number, because the mean of its divisors is an integer number (102260072544).

Almost surely, 2^204520145087 is an apocalyptic number.

204520145087 is a deficient number, since it is larger than the sum of its proper divisors (1).

204520145087 is an equidigital number, since it uses as much as digits as its factorization.

204520145087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 89600, while the sum is 38.

The spelling of 204520145087 in words is "two hundred four billion, five hundred twenty million, one hundred forty-five thousand, eighty-seven".