20010240517 has 2 divisors, whose sum is σ = 20010240518. Its totient is φ = 20010240516.

The previous prime is 20010240491. The next prime is 20010240563. The reversal of 20010240517 is 71504201002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11073563361 + 8936677156 = 105231^2 + 94534^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010240517 - 2¹⁹ = 20009716229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20010240917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005120258 + 10005120259.

It is an arithmetic number, because the mean of its divisors is an integer number (10005120259).

Almost surely, 2^20010240517 is an apocalyptic number.

It is an amenable number.

20010240517 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010240517 is an equidigital number, since it uses as much as digits as its factorization.

20010240517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 22.

Adding to 20010240517 its reverse (71504201002), we get a palindrome (91514441519).

The spelling of 20010240517 in words is "twenty billion, ten million, two hundred forty thousand, five hundred seventeen".