20244517 has 2 divisors, whose sum is σ = 20244518. Its totient is φ = 20244516.

The previous prime is 20244509. The next prime is 20244533. The reversal of 20244517 is 71544202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18931201 + 1313316 = 4351^2 + 1146^2 .

It is a cyclic number.

It is not a de Polignac number, because 20244517 - 2³ = 20244509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20244491 and 20244500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20244317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10122258 + 10122259.

It is an arithmetic number, because the mean of its divisors is an integer number (10122259).

Almost surely, 2^20244517 is an apocalyptic number.

It is an amenable number.

20244517 is a deficient number, since it is larger than the sum of its proper divisors (1).

20244517 is an equidigital number, since it uses as much as digits as its factorization.

20244517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 20244517 is about 4499.3907365331. The cubic root of 20244517 is about 272.5434860320.

Adding to 20244517 its reverse (71544202), we get a palindrome (91788719).

The spelling of 20244517 in words is "twenty million, two hundred forty-four thousand, five hundred seventeen".