20118306 has 32 divisors (see below), whose sum is σ = 44509248. Its totient is φ = 6022080.

The previous prime is 20118299. The next prime is 20118311. The reversal of 20118306 is 60381102.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 600 + ... + 6371.

It is an arithmetic number, because the mean of its divisors is an integer number (1390914).

Almost surely, 2^20118306 is an apocalyptic number.

20118306 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20118306 is an abundant number, since it is smaller than the sum of its proper divisors (24390942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20118306 is a wasteful number, since it uses less digits than its factorization.

20118306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7026.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 20118306 is about 4485.3434651094. The cubic root of 20118306 is about 271.9759296030.

Adding to 20118306 its reverse (60381102), we get a palindrome (80499408).

The spelling of 20118306 in words is "twenty million, one hundred eighteen thousand, three hundred six".