20195189 has 8 divisors (see below), whose sum is σ = 23164608. Its totient is φ = 17246880.

The previous prime is 20195179. The next prime is 20195221. The reversal of 20195189 is 98159102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20195189 - 2¹⁶ = 20129653 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 (20195179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3167 + ... + 7100.

It is an arithmetic number, because the mean of its divisors is an integer number (2895576).

Almost surely, 2^20195189 is an apocalyptic number.

It is an amenable number.

20195189 is a deficient number, since it is larger than the sum of its proper divisors (2969419).

20195189 is a wasteful number, since it uses less digits than its factorization.

20195189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10555.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 20195189 is about 4493.9057622518. The cubic root of 20195189 is about 272.3219452371.

The spelling of 20195189 in words is "twenty million, one hundred ninety-five thousand, one hundred eighty-nine".