19726763713 has 2 divisors, whose sum is σ = 19726763714. Its totient is φ = 19726763712.

The previous prime is 19726763689. The next prime is 19726763743. The reversal of 19726763713 is 31736762791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17781689104 + 1945074609 = 133348^2 + 44103^2 .

It is a cyclic number.

It is not a de Polignac number, because 19726763713 - 2²¹ = 19724666561 is a prime.

It is not a weakly prime, because it can be changed into another prime (19726763743) 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, 9863381856 + 9863381857.

It is an arithmetic number, because the mean of its divisors is an integer number (9863381857).

Almost surely, 2^19726763713 is an apocalyptic number.

It is an amenable number.

19726763713 is a deficient number, since it is larger than the sum of its proper divisors (1).

19726763713 is an equidigital number, since it uses as much as digits as its factorization.

19726763713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2000376, while the sum is 52.

The spelling of 19726763713 in words is "nineteen billion, seven hundred twenty-six million, seven hundred sixty-three thousand, seven hundred thirteen".