20216241 has 24 divisors (see below), whose sum is σ = 30750720. Its totient is φ = 12773376.

The previous prime is 20216237. The next prime is 20216243. The reversal of 20216241 is 14261202.

20216241 is a `hidden beast` number, since 20 + 21 + 624 + 1 = 666.

It is not a de Polignac number, because 20216241 - 2² = 20216237 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20216243) 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 23 ways as a sum of consecutive naturals, for example, 25905 + ... + 26673.

It is an arithmetic number, because the mean of its divisors is an integer number (1281280).

Almost surely, 2^20216241 is an apocalyptic number.

It is an amenable number.

20216241 is a deficient number, since it is larger than the sum of its proper divisors (10534479).

20216241 is a wasteful number, since it uses less digits than its factorization.

20216241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925 (or 922 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 20216241 is about 4496.2474353621. The cubic root of 20216241 is about 272.4165375794.

Adding to 20216241 its reverse (14261202), we get a palindrome (34477443).

The spelling of 20216241 in words is "twenty million, two hundred sixteen thousand, two hundred forty-one".