20654017 has 2 divisors, whose sum is σ = 20654018. Its totient is φ = 20654016.

The previous prime is 20653999. The next prime is 20654021. The reversal of 20654017 is 71045602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14258176 + 6395841 = 3776^2 + 2529^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20654017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20653982 and 20654000.

It is not a weakly prime, because it can be changed into another prime (20654077) 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, 10327008 + 10327009.

It is an arithmetic number, because the mean of its divisors is an integer number (10327009).

Almost surely, 2^20654017 is an apocalyptic number.

It is an amenable number.

20654017 is a deficient number, since it is larger than the sum of its proper divisors (1).

20654017 is an equidigital number, since it uses as much as digits as its factorization.

20654017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 20654017 is about 4544.6690748612. The cubic root of 20654017 is about 274.3688755437.

Adding to 20654017 its reverse (71045602), we get a palindrome (91699619).

The spelling of 20654017 in words is "twenty million, six hundred fifty-four thousand, seventeen".