20307241 has 4 divisors (see below), whose sum is σ = 20516692. Its totient is φ = 20097792.

The previous prime is 20307233. The next prime is 20307247. The reversal of 20307241 is 14270302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13395600 + 6911641 = 3660^2 + 2629^2 .

It is a cyclic number.

It is not a de Polignac number, because 20307241 - 2³ = 20307233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20307247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104580 + ... + 104773.

It is an arithmetic number, because the mean of its divisors is an integer number (5129173).

Almost surely, 2^20307241 is an apocalyptic number.

It is an amenable number.

20307241 is a deficient number, since it is larger than the sum of its proper divisors (209451).

20307241 is an equidigital number, since it uses as much as digits as its factorization.

20307241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209450.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 20307241 is about 4506.3556228953. The cubic root of 20307241 is about 272.8246715116.

Adding to 20307241 its reverse (14270302), we get a palindrome (34577543).

The spelling of 20307241 in words is "twenty million, three hundred seven thousand, two hundred forty-one".