20510758871 has 2 divisors, whose sum is σ = 20510758872. Its totient is φ = 20510758870.

The previous prime is 20510758867. The next prime is 20510758937. The reversal of 20510758871 is 17885701502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20510758871 - 2² = 20510758867 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20510758771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10255379435 + 10255379436.

It is an arithmetic number, because the mean of its divisors is an integer number (10255379436).

Almost surely, 2^20510758871 is an apocalyptic number.

20510758871 is a deficient number, since it is larger than the sum of its proper divisors (1).

20510758871 is an equidigital number, since it uses as much as digits as its factorization.

20510758871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 156800, while the sum is 44.

The spelling of 20510758871 in words is "twenty billion, five hundred ten million, seven hundred fifty-eight thousand, eight hundred seventy-one".