20019565189 has 8 divisors (see below), whose sum is σ = 21580457472. Its totient is φ = 18461662320.

The previous prime is 20019565183. The next prime is 20019565201. The reversal of 20019565189 is 98156591002.

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

It is a cyclic number.

It is not a de Polignac number, because 20019565189 - 2¹¹ = 20019563141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20019565183) 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, 733429 + ... + 760234.

It is an arithmetic number, because the mean of its divisors is an integer number (2697557184).

Almost surely, 2^20019565189 is an apocalyptic number.

It is an amenable number.

20019565189 is a deficient number, since it is larger than the sum of its proper divisors (1560892283).

20019565189 is a wasteful number, since it uses less digits than its factorization.

20019565189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494707.

The product of its (nonzero) digits is 194400, while the sum is 46.

The spelling of 20019565189 in words is "twenty billion, nineteen million, five hundred sixty-five thousand, one hundred eighty-nine".