19385355221 has 8 divisors (see below), whose sum is σ = 20528769600. Its totient is φ = 18242285248.

The previous prime is 19385355217. The next prime is 19385355239. The reversal of 19385355221 is 12255358391.

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 19385355221 - 2² = 19385355217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19385355211) 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, 34640 + ... + 199926.

It is an arithmetic number, because the mean of its divisors is an integer number (2566096200).

Almost surely, 2^19385355221 is an apocalyptic number.

It is an amenable number.

19385355221 is a deficient number, since it is larger than the sum of its proper divisors (1143414379).

19385355221 is a wasteful number, since it uses less digits than its factorization.

19385355221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172203.

The product of its digits is 324000, while the sum is 44.

The spelling of 19385355221 in words is "nineteen billion, three hundred eighty-five million, three hundred fifty-five thousand, two hundred twenty-one".