21113146426445 has 8 divisors (see below), whose sum is σ = 25505814475800. Its totient is φ = 16777157965120.

The previous prime is 21113146426433. The next prime is 21113146426451. The reversal of 21113146426445 is 54462464131112.

It can be written as a sum of positive squares in 4 ways, for example, as 1020752564329 + 20092393862116 = 1010323^2 + 4482454^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21113146426445 - 2⁶ = 21113146426381 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21113146426396 and 21113146426405.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 14169896186 + ... + 14169897675.

It is an arithmetic number, because the mean of its divisors is an integer number (3188226809475).

Almost surely, 2^{21113146426445} is an apocalyptic number.

It is an amenable number.

21113146426445 is a deficient number, since it is larger than the sum of its proper divisors (4392668049355).

21113146426445 is a wasteful number, since it uses less digits than its factorization.

21113146426445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28339794015.

The product of its digits is 552960, while the sum is 44.

The spelling of 21113146426445 in words is "twenty-one trillion, one hundred thirteen billion, one hundred forty-six million, four hundred twenty-six thousand, four hundred forty-five".