19320989 has 16 divisors (see below), whose sum is σ = 21168000. Its totient is φ = 17578176.

The previous prime is 19320947. The next prime is 19321007. The reversal of 19320989 is 98902391.

It is not a de Polignac number, because 19320989 - 2¹² = 19316893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19320089) 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, 55187 + ... + 55535.

It is an arithmetic number, because the mean of its divisors is an integer number (1323000).

Almost surely, 2^19320989 is an apocalyptic number.

It is an amenable number.

19320989 is a deficient number, since it is larger than the sum of its proper divisors (1847011).

19320989 is a wasteful number, since it uses less digits than its factorization.

19320989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 19320989 is about 4395.5646963729. The cubic root of 19320989 is about 268.3344612000.

The spelling of 19320989 in words is "nineteen million, three hundred twenty thousand, nine hundred eighty-nine".