20018241 has 12 divisors (see below), whose sum is σ = 29137680. Its totient is φ = 13242840.

The previous prime is 20018239. The next prime is 20018269. The reversal of 20018241 is 14281002.

It is not a de Polignac number, because 20018241 - 2¹ = 20018239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20018941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7311 + ... + 9668.

It is an arithmetic number, because the mean of its divisors is an integer number (2428140).

Almost surely, 2^20018241 is an apocalyptic number.

It is an amenable number.

20018241 is a deficient number, since it is larger than the sum of its proper divisors (9119439).

20018241 is a wasteful number, since it uses less digits than its factorization.

20018241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17116 (or 17113 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 20018241 is about 4474.1748960004. The cubic root of 20018241 is about 271.5242594035.

Adding to 20018241 its reverse (14281002), we get a palindrome (34299243).

The spelling of 20018241 in words is "twenty million, eighteen thousand, two hundred forty-one".