19319431893709 has 2 divisors, whose sum is σ = 19319431893710. Its totient is φ = 19319431893708.

The previous prime is 19319431893703. The next prime is 19319431893761. The reversal of 19319431893709 is 90739813491391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11909766808809 + 7409665084900 = 3451053^2 + 2722070^2 .

It is a cyclic number.

It is not a de Polignac number, because 19319431893709 - 2²³ = 19319423505101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19319431893703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9659715946854 + 9659715946855.

It is an arithmetic number, because the mean of its divisors is an integer number (9659715946855).

Almost surely, 2^{19319431893709} is an apocalyptic number.

It is an amenable number.

19319431893709 is a deficient number, since it is larger than the sum of its proper divisors (1).

19319431893709 is an equidigital number, since it uses as much as digits as its factorization.

19319431893709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39680928, while the sum is 67.

The spelling of 19319431893709 in words is "nineteen trillion, three hundred nineteen billion, four hundred thirty-one million, eight hundred ninety-three thousand, seven hundred nine".