21444315574065 has 16 divisors (see below), whose sum is σ = 34422666831168. Its totient is φ = 11399714335296.

The previous prime is 21444315574043. The next prime is 21444315574067. The reversal of 21444315574065 is 56047551344412.

It is a happy number.

It is not a de Polignac number, because 21444315574065 - 2¹⁰ = 21444315573041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21444315573999 and 21444315574017.

It is not an unprimeable number, because it can be changed into a prime (21444315574067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2328368422 + ... + 2328377631.

It is an arithmetic number, because the mean of its divisors is an integer number (2151416676948).

Almost surely, 2^{21444315574065} is an apocalyptic number.

It is an amenable number.

21444315574065 is a deficient number, since it is larger than the sum of its proper divisors (12978351257103).

21444315574065 is a wasteful number, since it uses less digits than its factorization.

21444315574065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4656746368.

The product of its (nonzero) digits is 8064000, while the sum is 51.

The spelling of 21444315574065 in words is "twenty-one trillion, four hundred forty-four billion, three hundred fifteen million, five hundred seventy-four thousand, sixty-five".