19688333389 has 2 divisors, whose sum is σ = 19688333390. Its totient is φ = 19688333388.

The previous prime is 19688333359. The next prime is 19688333419. The reversal of 19688333389 is 98333388691.

It is a balanced prime because it is at equal distance from previous prime (19688333359) and next prime (19688333419).

It can be written as a sum of positive squares in only one way, i.e., 19657442025 + 30891364 = 140205^2 + 5558^2 .

It is a cyclic number.

It is not a de Polignac number, because 19688333389 - 2⁷ = 19688333261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19688333359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9844166694 + 9844166695.

It is an arithmetic number, because the mean of its divisors is an integer number (9844166695).

Almost surely, 2^19688333389 is an apocalyptic number.

It is an amenable number.

19688333389 is a deficient number, since it is larger than the sum of its proper divisors (1).

19688333389 is an equidigital number, since it uses as much as digits as its factorization.

19688333389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20155392, while the sum is 61.

The spelling of 19688333389 in words is "nineteen billion, six hundred eighty-eight million, three hundred thirty-three thousand, three hundred eighty-nine".