1019109281819 has 4 divisors (see below), whose sum is σ = 1019145671544. Its totient is φ = 1019072892096.

The previous prime is 1019109281783. The next prime is 1019109281849. The reversal of 1019109281819 is 9181829019101.

1019109281819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1019109281819 is a prime.

It is a super-2 number, since 2×1019109281819² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1019109281849) 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, 18152822 + ... + 18208875.

It is an arithmetic number, because the mean of its divisors is an integer number (254786417886).

Almost surely, 2^{1019109281819} is an apocalyptic number.

1019109281819 is a deficient number, since it is larger than the sum of its proper divisors (36389725).

1019109281819 is an equidigital number, since it uses as much as digits as its factorization.

1019109281819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36389724.

The product of its (nonzero) digits is 93312, while the sum is 50.

The spelling of 1019109281819 in words is "one trillion, nineteen billion, one hundred nine million, two hundred eighty-one thousand, eight hundred nineteen".