118020185 has 4 divisors (see below), whose sum is σ = 141624228. Its totient is φ = 94416144.

The previous prime is 118020167. The next prime is 118020187. The reversal of 118020185 is 581020811.

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 71453209 + 46566976 = 8453^2 + 6824^2 .

It is a cyclic number.

It is not a de Polignac number, because 118020185 - 2¹² = 118016089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118020187) 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, 11802014 + ... + 11802023.

It is an arithmetic number, because the mean of its divisors is an integer number (35406057).

Almost surely, 2^118020185 is an apocalyptic number.

It is an amenable number.

118020185 is a deficient number, since it is larger than the sum of its proper divisors (23604043).

118020185 is an equidigital number, since it uses as much as digits as its factorization.

118020185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23604042.

The product of its (nonzero) digits is 640, while the sum is 26.

The square root of 118020185 is about 10863.7095414044. The cubic root of 118020185 is about 490.5147790051.

Adding to 118020185 its reverse (581020811), we get a palindrome (699040996).

The spelling of 118020185 in words is "one hundred eighteen million, twenty thousand, one hundred eighty-five".