19146856919 has 2 divisors, whose sum is σ = 19146856920. Its totient is φ = 19146856918.

The previous prime is 19146856913. The next prime is 19146856921. The reversal of 19146856919 is 91965864191.

It is a strong prime.

It is an emirp because it is prime and its reverse (91965864191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19146856919 - 2¹⁶ = 19146791383 is a prime.

It is a super-2 number, since 2×19146856919² (a number of 21 digits) contains 22 as substring.

Together with 19146856921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19146856913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9573428459 + 9573428460.

It is an arithmetic number, because the mean of its divisors is an integer number (9573428460).

Almost surely, 2^19146856919 is an apocalyptic number.

19146856919 is a deficient number, since it is larger than the sum of its proper divisors (1).

19146856919 is an equidigital number, since it uses as much as digits as its factorization.

19146856919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4199040, while the sum is 59.

The spelling of 19146856919 in words is "nineteen billion, one hundred forty-six million, eight hundred fifty-six thousand, nine hundred nineteen".