20846260517 has 2 divisors, whose sum is σ = 20846260518. Its totient is φ = 20846260516.

The previous prime is 20846260507. The next prime is 20846260607. The reversal of 20846260517 is 71506264802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16527930721 + 4318329796 = 128561^2 + 65714^2 .

It is a cyclic number.

It is not a de Polignac number, because 20846260517 - 2¹⁰ = 20846259493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20846260507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10423130258 + 10423130259.

It is an arithmetic number, because the mean of its divisors is an integer number (10423130259).

Almost surely, 2^20846260517 is an apocalyptic number.

It is an amenable number.

20846260517 is a deficient number, since it is larger than the sum of its proper divisors (1).

20846260517 is an equidigital number, since it uses as much as digits as its factorization.

20846260517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 20846260517 in words is "twenty billion, eight hundred forty-six million, two hundred sixty thousand, five hundred seventeen".