20417641 has 2 divisors, whose sum is σ = 20417642. Its totient is φ = 20417640.

The previous prime is 20417611. The next prime is 20417651. The reversal of 20417641 is 14671402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11417641 + 9000000 = 3379^2 + 3000^2 .

It is a cyclic number.

It is not a de Polignac number, because 20417641 - 2¹⁷ = 20286569 is a prime.

It is not a weakly prime, because it can be changed into another prime (20417611) 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, 10208820 + 10208821.

It is an arithmetic number, because the mean of its divisors is an integer number (10208821).

Almost surely, 2^20417641 is an apocalyptic number.

It is an amenable number.

20417641 is a deficient number, since it is larger than the sum of its proper divisors (1).

20417641 is an equidigital number, since it uses as much as digits as its factorization.

20417641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 20417641 is about 4518.5883857683. The cubic root of 20417641 is about 273.3181806327.

The spelling of 20417641 in words is "twenty million, four hundred seventeen thousand, six hundred forty-one".