16868567021837 has 4 divisors (see below), whose sum is σ = 16868690305920. Its totient is φ = 16868443737756.

The previous prime is 16868567021809. The next prime is 16868567021851. The reversal of 16868567021837 is 73812076586861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16868567021837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16868567021437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61436573 + ... + 61710530.

It is an arithmetic number, because the mean of its divisors is an integer number (4217172576480).

Almost surely, 2^{16868567021837} is an apocalyptic number.

It is an amenable number.

16868567021837 is a deficient number, since it is larger than the sum of its proper divisors (123284083).

16868567021837 is a wasteful number, since it uses less digits than its factorization.

16868567021837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123284082.

The product of its (nonzero) digits is 162570240, while the sum is 68.

The spelling of 16868567021837 in words is "sixteen trillion, eight hundred sixty-eight billion, five hundred sixty-seven million, twenty-one thousand, eight hundred thirty-seven".