20089165 has 4 divisors (see below), whose sum is σ = 24107004. Its totient is φ = 16071328.

The previous prime is 20089151. The next prime is 20089171. The reversal of 20089165 is 56198002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7107556 + 12981609 = 2666^2 + 3603^2 .

It is a cyclic number.

It is not a de Polignac number, because 20089165 - 2¹⁷ = 19958093 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2008912 + ... + 2008921.

It is an arithmetic number, because the mean of its divisors is an integer number (6026751).

Almost surely, 2^20089165 is an apocalyptic number.

It is an amenable number.

20089165 is a deficient number, since it is larger than the sum of its proper divisors (4017839).

20089165 is an equidigital number, since it uses as much as digits as its factorization.

20089165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4017838.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 20089165 is about 4482.0938187414. The cubic root of 20089165 is about 271.8445487540.

The spelling of 20089165 in words is "twenty million, eighty-nine thousand, one hundred sixty-five".