21364171144351 has 16 divisors (see below), whose sum is σ = 25701862924800. Its totient is φ = 17347941527328.

The previous prime is 21364171144321. The next prime is 21364171144397. The reversal of 21364171144351 is 15344117146312.

It is a cyclic number.

It is not a de Polignac number, because 21364171144351 - 2¹⁷ = 21364171013279 is a prime.

It is a super-2 number, since 2×21364171144351² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21364171144298 and 21364171144307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21364171144321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3853470 + ... + 7587988.

It is an arithmetic number, because the mean of its divisors is an integer number (1606366432800).

Almost surely, 2^{21364171144351} is an apocalyptic number.

21364171144351 is a deficient number, since it is larger than the sum of its proper divisors (4337691780449).

21364171144351 is a wasteful number, since it uses less digits than its factorization.

21364171144351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3777558.

The product of its digits is 241920, while the sum is 43.

The spelling of 21364171144351 in words is "twenty-one trillion, three hundred sixty-four billion, one hundred seventy-one million, one hundred forty-four thousand, three hundred fifty-one".