21366467744167 has 16 divisors (see below), whose sum is σ = 26297358776640. Its totient is φ = 16905229304832.

The previous prime is 21366467744161. The next prime is 21366467744183. The reversal of 21366467744167 is 76144776466312.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21366467744167 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21366467744099 and 21366467744108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21366467744161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15534009 + ... + 16853437.

It is an arithmetic number, because the mean of its divisors is an integer number (1643584923540).

Almost surely, 2^{21366467744167} is an apocalyptic number.

21366467744167 is a deficient number, since it is larger than the sum of its proper divisors (4930891032473).

21366467744167 is a wasteful number, since it uses less digits than its factorization.

21366467744167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497402.

The product of its digits is 170698752, while the sum is 64.

The spelling of 21366467744167 in words is "twenty-one trillion, three hundred sixty-six billion, four hundred sixty-seven million, seven hundred forty-four thousand, one hundred sixty-seven".