19385409018 has 8 divisors (see below), whose sum is σ = 38770818048. Its totient is φ = 6461803004.

The previous prime is 19385409013. The next prime is 19385409019. The reversal of 19385409018 is 81090458391.

It is a sphenic number, since it is the product of 3 distinct primes.

19385409018 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (19385409011) 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, 1615450746 + ... + 1615450757.

It is an arithmetic number, because the mean of its divisors is an integer number (4846352256).

Almost surely, 2^19385409018 is an apocalyptic number.

19385409018 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19385409018 is a wasteful number, since it uses less digits than its factorization.

19385409018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3230901508.

The product of its (nonzero) digits is 311040, while the sum is 48.

The spelling of 19385409018 in words is "nineteen billion, three hundred eighty-five million, four hundred nine thousand, eighteen".