20605241 has 8 divisors (see below), whose sum is σ = 21861864. Its totient is φ = 19353600.

The previous prime is 20605229. The next prime is 20605267. The reversal of 20605241 is 14250602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1201216 + 19404025 = 1096^2 + 4405^2 .

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 20605241 - 2¹⁸ = 20343097 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20605201) 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, 10541 + ... + 12341.

It is an arithmetic number, because the mean of its divisors is an integer number (2732733).

Almost surely, 2^20605241 is an apocalyptic number.

It is an amenable number.

20605241 is a deficient number, since it is larger than the sum of its proper divisors (1256623).

20605241 is a wasteful number, since it uses less digits than its factorization.

20605241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20605241 is about 4539.2996155795. The cubic root of 20605241 is about 274.1527244547.

Adding to 20605241 its reverse (14250602), we get a palindrome (34855843).

The spelling of 20605241 in words is "twenty million, six hundred five thousand, two hundred forty-one".