19328440985 has 16 divisors (see below), whose sum is σ = 27421632000. Its totient is φ = 12796760256.

The previous prime is 19328440919. The next prime is 19328440987. The reversal of 19328440985 is 58904482391.

It is not a de Polignac number, because 19328440985 - 2¹² = 19328436889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19328440987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9520385 + ... + 9522414.

It is an arithmetic number, because the mean of its divisors is an integer number (1713852000).

Almost surely, 2^19328440985 is an apocalyptic number.

It is an amenable number.

19328440985 is a deficient number, since it is larger than the sum of its proper divisors (8093191015).

19328440985 is a wasteful number, since it uses less digits than its factorization.

19328440985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19042840.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The spelling of 19328440985 in words is "nineteen billion, three hundred twenty-eight million, four hundred forty thousand, nine hundred eighty-five".