19389965 has 16 divisors (see below), whose sum is σ = 26801280. Its totient is φ = 13191360.

The previous prime is 19389959. The next prime is 19389967. The reversal of 19389965 is 56998391.

It is not a de Polignac number, because 19389965 - 2¹² = 19385869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19389967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2471 + ... + 6699.

It is an arithmetic number, because the mean of its divisors is an integer number (1675080).

Almost surely, 2^19389965 is an apocalyptic number.

It is an amenable number.

19389965 is a deficient number, since it is larger than the sum of its proper divisors (7411315).

19389965 is a wasteful number, since it uses less digits than its factorization.

19389965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4372.

The product of its digits is 524880, while the sum is 50.

The square root of 19389965 is about 4403.4037970643. The cubic root of 19389965 is about 268.6534002922.

The spelling of 19389965 in words is "nineteen million, three hundred eighty-nine thousand, nine hundred sixty-five".