19008785819 has 2 divisors, whose sum is σ = 19008785820. Its totient is φ = 19008785818.

The previous prime is 19008785813. The next prime is 19008785821. The reversal of 19008785819 is 91858780091.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19008785819 - 2³² = 14713818523 is a prime.

It is a super-2 number, since 2×19008785819² (a number of 21 digits) contains 22 as substring.

Together with 19008785821, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19008785813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9504392909 + 9504392910.

It is an arithmetic number, because the mean of its divisors is an integer number (9504392910).

Almost surely, 2^19008785819 is an apocalyptic number.

19008785819 is a deficient number, since it is larger than the sum of its proper divisors (1).

19008785819 is an equidigital number, since it uses as much as digits as its factorization.

19008785819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 56.

The spelling of 19008785819 in words is "nineteen billion, eight million, seven hundred eighty-five thousand, eight hundred nineteen".