20164315439 has 2 divisors, whose sum is σ = 20164315440. Its totient is φ = 20164315438.

The previous prime is 20164315373. The next prime is 20164315517. The reversal of 20164315439 is 93451346102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20164315439 - 2²⁰ = 20163266863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20164318439) 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 as a sum of consecutive naturals, namely, 10082157719 + 10082157720.

It is an arithmetic number, because the mean of its divisors is an integer number (10082157720).

Almost surely, 2^20164315439 is an apocalyptic number.

20164315439 is a deficient number, since it is larger than the sum of its proper divisors (1).

20164315439 is an equidigital number, since it uses as much as digits as its factorization.

20164315439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 20164315439 in words is "twenty billion, one hundred sixty-four million, three hundred fifteen thousand, four hundred thirty-nine".