16868567021851 has 2 divisors, whose sum is σ = 16868567021852. Its totient is φ = 16868567021850.

The previous prime is 16868567021809. The next prime is 16868567021863. The reversal of 16868567021851 is 15812076586861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16868567021851 - 2¹³ = 16868567013659 is a prime.

It is a super-2 number, since 2×16868567021851² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16868567025851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8434283510925 + 8434283510926.

It is an arithmetic number, because the mean of its divisors is an integer number (8434283510926).

Almost surely, 2^{16868567021851} is an apocalyptic number.

16868567021851 is a deficient number, since it is larger than the sum of its proper divisors (1).

16868567021851 is an equidigital number, since it uses as much as digits as its factorization.

16868567021851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38707200, while the sum is 64.

The spelling of 16868567021851 in words is "sixteen trillion, eight hundred sixty-eight billion, five hundred sixty-seven million, twenty-one thousand, eight hundred fifty-one".