20404241 has 16 divisors (see below), whose sum is σ = 24235008. Its totient is φ = 16934400.

The previous prime is 20404213. The next prime is 20404249. The reversal of 20404241 is 14240402.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20404241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20404249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13136 + ... + 14606.

It is an arithmetic number, because the mean of its divisors is an integer number (1514688).

Almost surely, 2^20404241 is an apocalyptic number.

It is an amenable number.

20404241 is a deficient number, since it is larger than the sum of its proper divisors (3830767).

20404241 is a wasteful number, since it uses less digits than its factorization.

20404241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 20404241 is about 4517.1053784476. The cubic root of 20404241 is about 273.2583750764.

Adding to 20404241 its reverse (14240402), we get a palindrome (34644643).

The spelling of 20404241 in words is "twenty million, four hundred four thousand, two hundred forty-one".