204423501439 has 2 divisors, whose sum is σ = 204423501440. Its totient is φ = 204423501438.

The previous prime is 204423501437. The next prime is 204423501449. The reversal of 204423501439 is 934105324402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204423501439 - 2¹ = 204423501437 is a prime.

Together with 204423501437, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 204423501398 and 204423501407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204423501437) 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, 102211750719 + 102211750720.

It is an arithmetic number, because the mean of its divisors is an integer number (102211750720).

Almost surely, 2^204423501439 is an apocalyptic number.

204423501439 is a deficient number, since it is larger than the sum of its proper divisors (1).

204423501439 is an equidigital number, since it uses as much as digits as its factorization.

204423501439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 204423501439 in words is "two hundred four billion, four hundred twenty-three million, five hundred one thousand, four hundred thirty-nine".