20089169 has 4 divisors (see below), whose sum is σ = 20314980. Its totient is φ = 19863360.

The previous prime is 20089151. The next prime is 20089171. The reversal of 20089169 is 96198002.

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 3385600 + 16703569 = 1840^2 + 4087^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20089169 is a prime.

It is a super-2 number, since 2×20089169² = 807149422221122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20089109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112772 + ... + 112949.

It is an arithmetic number, because the mean of its divisors is an integer number (5078745).

Almost surely, 2^20089169 is an apocalyptic number.

It is an amenable number.

20089169 is a deficient number, since it is larger than the sum of its proper divisors (225811).

20089169 is an equidigital number, since it uses as much as digits as its factorization.

20089169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225810.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 20089169 is about 4482.0942649614. The cubic root of 20089169 is about 271.8445667965.

The spelling of 20089169 in words is "twenty million, eighty-nine thousand, one hundred sixty-nine".