20709041 has 2 divisors, whose sum is σ = 20709042. Its totient is φ = 20709040.

The previous prime is 20708971. The next prime is 20709053. The reversal of 20709041 is 14090702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18447025 + 2262016 = 4295^2 + 1504^2 .

It is a cyclic number.

It is not a de Polignac number, because 20709041 - 2¹⁸ = 20446897 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20708998 and 20709016.

It is not a weakly prime, because it can be changed into another prime (20709641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10354520 + 10354521.

It is an arithmetic number, because the mean of its divisors is an integer number (10354521).

Almost surely, 2^20709041 is an apocalyptic number.

It is an amenable number.

20709041 is a deficient number, since it is larger than the sum of its proper divisors (1).

20709041 is an equidigital number, since it uses as much as digits as its factorization.

20709041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 20709041 is about 4550.7187344418. The cubic root of 20709041 is about 274.6123065815.

Adding to 20709041 its reverse (14090702), we get a palindrome (34799743).

It can be divided in two parts, 2070 and 9041, that added together give a palindrome (11111).

The spelling of 20709041 in words is "twenty million, seven hundred nine thousand, forty-one".