21848806445 has 8 divisors (see below), whose sum is σ = 26237184120. Its totient is φ = 17466634240.

The previous prime is 21848806379. The next prime is 21848806489. The reversal of 21848806445 is 54460884812.

It can be written as a sum of positive squares in 4 ways, for example, as 2480239204 + 19368567241 = 49802^2 + 139171^2 .

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

It is not a de Polignac number, because 21848806445 - 2¹⁸ = 21848544301 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21848806393 and 21848806402.

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, 1543616 + ... + 1557705.

It is an arithmetic number, because the mean of its divisors is an integer number (3279648015).

Almost surely, 2^21848806445 is an apocalyptic number.

It is an amenable number.

21848806445 is a deficient number, since it is larger than the sum of its proper divisors (4388377675).

21848806445 is a wasteful number, since it uses less digits than its factorization.

21848806445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3102735.

The product of its (nonzero) digits is 1966080, while the sum is 50.

The spelling of 21848806445 in words is "twenty-one billion, eight hundred forty-eight million, eight hundred six thousand, four hundred forty-five".