20440201 has 2 divisors, whose sum is σ = 20440202. Its totient is φ = 20440200.

The previous prime is 20440177. The next prime is 20440207. The reversal of 20440201 is 10204402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20430400 + 9801 = 4520^2 + 99^2 .

It is a cyclic number.

It is not a de Polignac number, because 20440201 - 2¹⁷ = 20309129 is a prime.

It is not a weakly prime, because it can be changed into another prime (20440207) 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 as a sum of consecutive naturals, namely, 10220100 + 10220101.

It is an arithmetic number, because the mean of its divisors is an integer number (10220101).

Almost surely, 2^20440201 is an apocalyptic number.

It is an amenable number.

20440201 is a deficient number, since it is larger than the sum of its proper divisors (1).

20440201 is an equidigital number, since it uses as much as digits as its factorization.

20440201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 20440201 is about 4521.0840514195. The cubic root of 20440201 is about 273.4188091126.

Adding to 20440201 its reverse (10204402), we get a palindrome (30644603).

The spelling of 20440201 in words is "twenty million, four hundred forty thousand, two hundred one".