20246660617 has 2 divisors, whose sum is σ = 20246660618. Its totient is φ = 20246660616.

The previous prime is 20246660513. The next prime is 20246660627. The reversal of 20246660617 is 71606664202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18016082176 + 2230578441 = 134224^2 + 47229^2 .

It is a cyclic number.

It is not a de Polignac number, because 20246660617 - 2³¹ = 18099176969 is a prime.

It is a super-2 number, since 2×20246660617² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20246660617.

It is not a weakly prime, because it can be changed into another prime (20246660627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10123330308 + 10123330309.

It is an arithmetic number, because the mean of its divisors is an integer number (10123330309).

Almost surely, 2^20246660617 is an apocalyptic number.

It is an amenable number.

20246660617 is a deficient number, since it is larger than the sum of its proper divisors (1).

20246660617 is an equidigital number, since it uses as much as digits as its factorization.

20246660617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 20246660617 in words is "twenty billion, two hundred forty-six million, six hundred sixty thousand, six hundred seventeen".