20758811287 has 2 divisors, whose sum is σ = 20758811288. Its totient is φ = 20758811286.

The previous prime is 20758811267. The next prime is 20758811303. The reversal of 20758811287 is 78211885702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20758811287 - 2¹⁵ = 20758778519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20758811287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20758811267) 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, 10379405643 + 10379405644.

It is an arithmetic number, because the mean of its divisors is an integer number (10379405644).

Almost surely, 2^20758811287 is an apocalyptic number.

20758811287 is a deficient number, since it is larger than the sum of its proper divisors (1).

20758811287 is an equidigital number, since it uses as much as digits as its factorization.

20758811287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 501760, while the sum is 49.

The spelling of 20758811287 in words is "twenty billion, seven hundred fifty-eight million, eight hundred eleven thousand, two hundred eighty-seven".