2189518989 has 24 divisors (see below), whose sum is σ = 3422757888. Its totient is φ = 1241291520.

The previous prime is 2189518963. The next prime is 2189519009. The reversal of 2189518989 is 9898159812.

It is not a de Polignac number, because 2189518989 - 2⁹ = 2189518477 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189518949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39972 + ... + 77309.

It is an arithmetic number, because the mean of its divisors is an integer number (142614912).

Almost surely, 2^2189518989 is an apocalyptic number.

It is an amenable number.

2189518989 is a deficient number, since it is larger than the sum of its proper divisors (1233238899).

2189518989 is a wasteful number, since it uses less digits than its factorization.

2189518989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117425 (or 117418 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 60.

The square root of 2189518989 is about 46792.2962569695. The cubic root of 2189518989 is about 1298.5227774549.

The spelling of 2189518989 in words is "two billion, one hundred eighty-nine million, five hundred eighteen thousand, nine hundred eighty-nine".