21443511342245 has 8 divisors (see below), whose sum is σ = 25904913031800. Its totient is φ = 17039676126400.

The previous prime is 21443511342167. The next prime is 21443511342251. The reversal of 21443511342245 is 54224311534412.

It can be written as a sum of positive squares in 4 ways, for example, as 88594927201 + 21354916415044 = 297649^2 + 4621138^2 .

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

It is not a de Polignac number, because 21443511342245 - 2¹² = 21443511338149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14391617606 + ... + 14391619095.

It is an arithmetic number, because the mean of its divisors is an integer number (3238114128975).

Almost surely, 2^{21443511342245} is an apocalyptic number.

It is an amenable number.

21443511342245 is a deficient number, since it is larger than the sum of its proper divisors (4461401689555).

21443511342245 is a wasteful number, since it uses less digits than its factorization.

21443511342245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28783236855.

The product of its digits is 460800, while the sum is 41.

Adding to 21443511342245 its reverse (54224311534412), we get a palindrome (75667822876657).

The spelling of 21443511342245 in words is "twenty-one trillion, four hundred forty-three billion, five hundred eleven million, three hundred forty-two thousand, two hundred forty-five".