20431241 has 4 divisors (see below), whose sum is σ = 20452500. Its totient is φ = 20409984.

The previous prime is 20431237. The next prime is 20431247. The reversal of 20431241 is 14213402.

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 6150400 + 14280841 = 2480^2 + 3779^2 .

It is a cyclic number.

It is not a de Polignac number, because 20431241 - 2² = 20431237 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20431247) 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, 9116 + ... + 11133.

It is an arithmetic number, because the mean of its divisors is an integer number (5113125).

Almost surely, 2^20431241 is an apocalyptic number.

It is an amenable number.

20431241 is a deficient number, since it is larger than the sum of its proper divisors (21259).

20431241 is a wasteful number, since it uses less digits than its factorization.

20431241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21258.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 20431241 is about 4520.0930300161. The cubic root of 20431241 is about 273.3788520597.

Adding to 20431241 its reverse (14213402), we get a palindrome (34644643).

The spelling of 20431241 in words is "twenty million, four hundred thirty-one thousand, two hundred forty-one".