19006299919 has 4 divisors (see below), whose sum is σ = 19619406400. Its totient is φ = 18393193440.

The previous prime is 19006299913. The next prime is 19006299959. The reversal of 19006299919 is 91999260091.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19006299919 - 2³ = 19006299911 is a prime.

It is a super-2 number, since 2×19006299919² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19006299919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19006299911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306553194 + ... + 306553255.

It is an arithmetic number, because the mean of its divisors is an integer number (4904851600).

Almost surely, 2^19006299919 is an apocalyptic number.

19006299919 is a deficient number, since it is larger than the sum of its proper divisors (613106481).

19006299919 is an equidigital number, since it uses as much as digits as its factorization.

19006299919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613106480.

The product of its (nonzero) digits is 708588, while the sum is 55.

The spelling of 19006299919 in words is "nineteen billion, six million, two hundred ninety-nine thousand, nine hundred nineteen".