19889073 has 12 divisors (see below), whose sum is σ = 29655808. Its totient is φ = 12831480.

The previous prime is 19889057. The next prime is 19889081. The reversal of 19889073 is 37098891.

It is not a de Polignac number, because 19889073 - 2⁴ = 19889057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19889033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35365 + ... + 35922.

Almost surely, 2^19889073 is an apocalyptic number.

It is an amenable number.

19889073 is a deficient number, since it is larger than the sum of its proper divisors (9766735).

19889073 is a wasteful number, since it uses less digits than its factorization.

19889073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71324 (or 71321 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 19889073 is about 4459.7166950379. The cubic root of 19889073 is about 270.9389939973.

The spelling of 19889073 in words is "nineteen million, eight hundred eighty-nine thousand, seventy-three".