20000317439 has 2 divisors, whose sum is σ = 20000317440. Its totient is φ = 20000317438.

The previous prime is 20000317433. The next prime is 20000317457. The reversal of 20000317439 is 93471300002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20000317439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20000317433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000158719 + 10000158720.

It is an arithmetic number, because the mean of its divisors is an integer number (10000158720).

Almost surely, 2^20000317439 is an apocalyptic number.

20000317439 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000317439 is an equidigital number, since it uses as much as digits as its factorization.

20000317439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 29.

The spelling of 20000317439 in words is "twenty billion, three hundred seventeen thousand, four hundred thirty-nine".