20687068867 has 2 divisors, whose sum is σ = 20687068868. Its totient is φ = 20687068866.

The previous prime is 20687068841. The next prime is 20687068901. The reversal of 20687068867 is 76886078602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20687068867 - 2¹¹ = 20687066819 is a prime.

It is not a weakly prime, because it can be changed into another prime (20687068267) 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, 10343534433 + 10343534434.

It is an arithmetic number, because the mean of its divisors is an integer number (10343534434).

Almost surely, 2^20687068867 is an apocalyptic number.

20687068867 is a deficient number, since it is larger than the sum of its proper divisors (1).

20687068867 is an equidigital number, since it uses as much as digits as its factorization.

20687068867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10838016, while the sum is 58.

The spelling of 20687068867 in words is "twenty billion, six hundred eighty-seven million, sixty-eight thousand, eight hundred sixty-seven".