20427241 has 2 divisors, whose sum is σ = 20427242. Its totient is φ = 20427240.

The previous prime is 20427229. The next prime is 20427247. The reversal of 20427241 is 14272402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20250000 + 177241 = 4500^2 + 421^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20427241 is a prime.

It is not a weakly prime, because it can be changed into another prime (20427247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10213620 + 10213621.

It is an arithmetic number, because the mean of its divisors is an integer number (10213621).

Almost surely, 2^20427241 is an apocalyptic number.

It is an amenable number.

20427241 is a deficient number, since it is larger than the sum of its proper divisors (1).

20427241 is an equidigital number, since it uses as much as digits as its factorization.

20427241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 20427241 is about 4519.6505395882. The cubic root of 20427241 is about 273.3610103179.

Adding to 20427241 its reverse (14272402), we get a palindrome (34699643).

The spelling of 20427241 in words is "twenty million, four hundred twenty-seven thousand, two hundred forty-one".