18806011 has 4 divisors (see below), whose sum is σ = 21492592. Its totient is φ = 16119432.

The previous prime is 18805951. The next prime is 18806077. The reversal of 18806011 is 11060881.

It is a happy number.

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

It is not a de Polignac number, because 18806011 - 2¹¹ = 18803963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18806611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1343280 + ... + 1343293.

It is an arithmetic number, because the mean of its divisors is an integer number (5373148).

Almost surely, 2^18806011 is an apocalyptic number.

18806011 is a deficient number, since it is larger than the sum of its proper divisors (2686581).

18806011 is an equidigital number, since it uses as much as digits as its factorization.

18806011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2686580.

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 18806011 is about 4336.5897892238. The cubic root of 18806011 is about 265.9289151828.

Adding to 18806011 its reverse (11060881), we get a palindrome (29866892).

The spelling of 18806011 in words is "eighteen million, eight hundred six thousand, eleven".