191819002819 has 2 divisors, whose sum is σ = 191819002820. Its totient is φ = 191819002818.

The previous prime is 191819002769. The next prime is 191819002841. The reversal of 191819002819 is 918200918191.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (918200918191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 191819002819 - 2¹⁵ = 191818970051 is a prime.

It is a super-2 number, since 2×191819002819² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (191819002519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95909501409 + 95909501410.

It is an arithmetic number, because the mean of its divisors is an integer number (95909501410).

Almost surely, 2^191819002819 is an apocalyptic number.

191819002819 is a deficient number, since it is larger than the sum of its proper divisors (1).

191819002819 is an equidigital number, since it uses as much as digits as its factorization.

191819002819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 49.

The spelling of 191819002819 in words is "one hundred ninety-one billion, eight hundred nineteen million, two thousand, eight hundred nineteen".