20168017739 has 2 divisors, whose sum is σ = 20168017740. Its totient is φ = 20168017738.

The previous prime is 20168017733. The next prime is 20168017759. The reversal of 20168017739 is 93771086102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20168017739 - 2²⁴ = 20151240523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20168017739.

It is not a weakly prime, because it can be changed into another prime (20168017733) 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, 10084008869 + 10084008870.

It is an arithmetic number, because the mean of its divisors is an integer number (10084008870).

Almost surely, 2^20168017739 is an apocalyptic number.

20168017739 is a deficient number, since it is larger than the sum of its proper divisors (1).

20168017739 is an equidigital number, since it uses as much as digits as its factorization.

20168017739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The spelling of 20168017739 in words is "twenty billion, one hundred sixty-eight million, seventeen thousand, seven hundred thirty-nine".