19016343845 has 4 divisors (see below), whose sum is σ = 22819612620. Its totient is φ = 15213075072.

The previous prime is 19016343839. The next prime is 19016343851. The reversal of 19016343845 is 54834361091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54834361091 = 2713 ⋅20211707.

It is an interprime number because it is at equal distance from previous prime (19016343839) and next prime (19016343851).

It can be written as a sum of positive squares in 2 ways, for example, as 10321340836 + 8695003009 = 101594^2 + 93247^2 .

It is a cyclic number.

It is not a de Polignac number, because 19016343845 - 2²⁶ = 18949234981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19016343796 and 19016343805.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1901634380 + ... + 1901634389.

It is an arithmetic number, because the mean of its divisors is an integer number (5704903155).

Almost surely, 2^19016343845 is an apocalyptic number.

It is an amenable number.

19016343845 is a deficient number, since it is larger than the sum of its proper divisors (3803268775).

19016343845 is an equidigital number, since it uses as much as digits as its factorization.

19016343845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3803268774.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 19016343845 in words is "nineteen billion, sixteen million, three hundred forty-three thousand, eight hundred forty-five".