20118385 has 16 divisors (see below), whose sum is σ = 27720576. Its totient is φ = 13730688.

The previous prime is 20118379. The next prime is 20118389. The reversal of 20118385 is 58381102.

It is a cyclic number.

It is not a de Polignac number, because 20118385 - 2¹¹ = 20116337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20118389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6922 + ... + 9388.

It is an arithmetic number, because the mean of its divisors is an integer number (1732536).

Almost surely, 2^20118385 is an apocalyptic number.

It is an amenable number.

20118385 is a deficient number, since it is larger than the sum of its proper divisors (7602191).

20118385 is a wasteful number, since it uses less digits than its factorization.

20118385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2712.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 20118385 is about 4485.3522715613. The cubic root of 20118385 is about 271.9762855983.

Adding to 20118385 its reverse (58381102), we get a palindrome (78499487).

It can be divided in two parts, 20118 and 385, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 20118385 in words is "twenty million, one hundred eighteen thousand, three hundred eighty-five".