20545201 has 2 divisors, whose sum is σ = 20545202. Its totient is φ = 20545200.

The previous prime is 20545183. The next prime is 20545207. The reversal of 20545201 is 10254502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18792225 + 1752976 = 4335^2 + 1324^2 .

It is a cyclic number.

It is not a de Polignac number, because 20545201 - 2⁵ = 20545169 is a prime.

It is not a weakly prime, because it can be changed into another prime (20545207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10272600 + 10272601.

It is an arithmetic number, because the mean of its divisors is an integer number (10272601).

Almost surely, 2^20545201 is an apocalyptic number.

It is an amenable number.

20545201 is a deficient number, since it is larger than the sum of its proper divisors (1).

20545201 is an equidigital number, since it uses as much as digits as its factorization.

20545201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 20545201 is about 4532.6814359714. The cubic root of 20545201 is about 273.8861880138.

Adding to 20545201 its reverse (10254502), we get a palindrome (30799703).

The spelling of 20545201 in words is "twenty million, five hundred forty-five thousand, two hundred one".