19754138219 has 2 divisors, whose sum is σ = 19754138220. Its totient is φ = 19754138218.

The previous prime is 19754138203. The next prime is 19754138237. The reversal of 19754138219 is 91283145791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19754138219 - 2⁴ = 19754138203 is a prime.

It is a super-2 number, since 2×19754138219² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19754138269) 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, 9877069109 + 9877069110.

It is an arithmetic number, because the mean of its divisors is an integer number (9877069110).

Almost surely, 2^19754138219 is an apocalyptic number.

19754138219 is a deficient number, since it is larger than the sum of its proper divisors (1).

19754138219 is an equidigital number, since it uses as much as digits as its factorization.

19754138219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 50.

The spelling of 19754138219 in words is "nineteen billion, seven hundred fifty-four million, one hundred thirty-eight thousand, two hundred nineteen".