20572241 has 2 divisors, whose sum is σ = 20572242. Its totient is φ = 20572240.

The previous prime is 20572219. The next prime is 20572243. The reversal of 20572241 is 14227502.

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., 20286016 + 286225 = 4504^2 + 535^2 .

It is a cyclic number.

It is not a de Polignac number, because 20572241 - 2⁶ = 20572177 is a prime.

Together with 20572243, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20572243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10286120 + 10286121.

It is an arithmetic number, because the mean of its divisors is an integer number (10286121).

Almost surely, 2^20572241 is an apocalyptic number.

It is an amenable number.

20572241 is a deficient number, since it is larger than the sum of its proper divisors (1).

20572241 is an equidigital number, since it uses as much as digits as its factorization.

20572241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 20572241 is about 4535.6632370581. The cubic root of 20572241 is about 274.0062912580.

Adding to 20572241 its reverse (14227502), we get a palindrome (34799743).

The spelling of 20572241 in words is "twenty million, five hundred seventy-two thousand, two hundred forty-one".