20760172813 has 2 divisors, whose sum is σ = 20760172814. Its totient is φ = 20760172812.

The previous prime is 20760172799. The next prime is 20760172837. The reversal of 20760172813 is 31827106702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14424490404 + 6335682409 = 120102^2 + 79597^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20760172813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20760172843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10380086406 + 10380086407.

It is an arithmetic number, because the mean of its divisors is an integer number (10380086407).

Almost surely, 2^20760172813 is an apocalyptic number.

It is an amenable number.

20760172813 is a deficient number, since it is larger than the sum of its proper divisors (1).

20760172813 is an equidigital number, since it uses as much as digits as its factorization.

20760172813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 37.

The spelling of 20760172813 in words is "twenty billion, seven hundred sixty million, one hundred seventy-two thousand, eight hundred thirteen".