21414042521345 has 32 divisors (see below), whose sum is σ = 27225305985024. Its totient is φ = 16135677835200.

The previous prime is 21414042521323. The next prime is 21414042521351. The reversal of 21414042521345 is 54312524041412.

It is not a de Polignac number, because 21414042521345 - 2¹⁴ = 21414042504961 is a prime.

It is a super-2 number, since 2×21414042521345² (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 = 21414042521299 and 21414042521308.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 5004884 + ... + 8238746.

It is an arithmetic number, because the mean of its divisors is an integer number (850790812032).

Almost surely, 2^{21414042521345} is an apocalyptic number.

It is an amenable number.

21414042521345 is a deficient number, since it is larger than the sum of its proper divisors (5811263463679).

21414042521345 is a wasteful number, since it uses less digits than its factorization.

21414042521345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3234773.

The product of its (nonzero) digits is 153600, while the sum is 38.

Adding to 21414042521345 its reverse (54312524041412), we get a palindrome (75726566562757).

The spelling of 21414042521345 in words is "twenty-one trillion, four hundred fourteen billion, forty-two million, five hundred twenty-one thousand, three hundred forty-five".