19065914221 has 12 divisors (see below), whose sum is σ = 19719740736. Its totient is φ = 18433131960.

The previous prime is 19065914207. The next prime is 19065914261. The reversal of 19065914221 is 12241956091.

It is not a de Polignac number, because 19065914221 - 2⁹ = 19065913709 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 (19065914261) 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 11 ways as a sum of consecutive naturals, for example, 1050990 + ... + 1068976.

It is an arithmetic number, because the mean of its divisors is an integer number (1643311728).

Almost surely, 2^19065914221 is an apocalyptic number.

It is an amenable number.

19065914221 is a deficient number, since it is larger than the sum of its proper divisors (653826515).

19065914221 is a wasteful number, since it uses less digits than its factorization.

19065914221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19152 (or 19121 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 19065914221 in words is "nineteen billion, sixty-five million, nine hundred fourteen thousand, two hundred twenty-one".