19386329329 has 4 divisors (see below), whose sum is σ = 19386786420. Its totient is φ = 19385872240.

The previous prime is 19386329323. The next prime is 19386329351. The reversal of 19386329329 is 92392368391.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92392368391 = 67 ⋅1378990573.

It can be written as a sum of positive squares in 2 ways, for example, as 2446786225 + 16939543104 = 49465^2 + 130152^2 .

It is a cyclic number.

It is not a de Polignac number, because 19386329329 - 2⁷ = 19386329201 is a prime.

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 19386329329.

It is not an unprimeable number, because it can be changed into a prime (19386329323) 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, 157582 + ... + 252199.

It is an arithmetic number, because the mean of its divisors is an integer number (4846696605).

Almost surely, 2^19386329329 is an apocalyptic number.

It is an amenable number.

19386329329 is a deficient number, since it is larger than the sum of its proper divisors (457091).

19386329329 is an equidigital number, since it uses as much as digits as its factorization.

19386329329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457090.

The product of its digits is 3779136, while the sum is 55.

The spelling of 19386329329 in words is "nineteen billion, three hundred eighty-six million, three hundred twenty-nine thousand, three hundred twenty-nine".