20118089 has 8 divisors (see below), whose sum is σ = 21514248. Its totient is φ = 18745600.

The previous prime is 20118073. The next prime is 20118097. The reversal of 20118089 is 98081102.

It can be written as a sum of positive squares in 4 ways, for example, as 4182025 + 15936064 = 2045^2 + 3992^2 .

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

It is not a de Polignac number, because 20118089 - 2⁴ = 20118073 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20118029) 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, 4142 + ... + 7575.

It is an arithmetic number, because the mean of its divisors is an integer number (2689281).

Almost surely, 2^20118089 is an apocalyptic number.

It is an amenable number.

20118089 is a deficient number, since it is larger than the sum of its proper divisors (1396159).

20118089 is a wasteful number, since it uses less digits than its factorization.

20118089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11835.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 20118089 is about 4485.3192751464. The cubic root of 20118089 is about 271.9749517375.

The spelling of 20118089 in words is "twenty million, one hundred eighteen thousand, eighty-nine".