20018235 has 8 divisors (see below), whose sum is σ = 32029200. Its totient is φ = 10676384.

The previous prime is 20018227. The next prime is 20018239. The reversal of 20018235 is 53281002.

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

It is a cyclic number.

It is not a de Polignac number, because 20018235 - 2³ = 20018227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20018239) 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, 667260 + ... + 667289.

It is an arithmetic number, because the mean of its divisors is an integer number (4003650).

Almost surely, 2^20018235 is an apocalyptic number.

20018235 is a deficient number, since it is larger than the sum of its proper divisors (12010965).

20018235 is a wasteful number, since it uses less digits than its factorization.

20018235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334557.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20018235 is about 4474.1742254856. The cubic root of 20018235 is about 271.5242322758.

Adding to 20018235 its reverse (53281002), we get a palindrome (73299237).

The spelling of 20018235 in words is "twenty million, eighteen thousand, two hundred thirty-five".