19850928809 has 8 divisors (see below), whose sum is σ = 19981792320. Its totient is φ = 19720121616.

The previous prime is 19850928787. The next prime is 19850928821. The reversal of 19850928809 is 90882905891.

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

It is a cyclic number.

It is not a de Polignac number, because 19850928809 - 2¹⁶ = 19850863273 is a prime.

It is a super-3 number, since 3×19850928809³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19850927809) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 877292 + ... + 899634.

It is an arithmetic number, because the mean of its divisors is an integer number (2497724040).

Almost surely, 2^19850928809 is an apocalyptic number.

It is an amenable number.

19850928809 is a deficient number, since it is larger than the sum of its proper divisors (130863511).

19850928809 is a wasteful number, since it uses less digits than its factorization.

19850928809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28159.

The product of its (nonzero) digits is 3732480, while the sum is 59.

The spelling of 19850928809 in words is "nineteen billion, eight hundred fifty million, nine hundred twenty-eight thousand, eight hundred nine".