21444343014143 has 16 divisors (see below), whose sum is σ = 24626092829184. Its totient is φ = 18292176272160.

The previous prime is 21444343014139. The next prime is 21444343014179. The reversal of 21444343014143 is 34141034344412.

It is a happy number.

It is not a de Polignac number, because 21444343014143 - 2² = 21444343014139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21444343014097 and 21444343014106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21444343014343) 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, 16686446 + ... + 17925572.

It is an arithmetic number, because the mean of its divisors is an integer number (1539130801824).

Almost surely, 2^{21444343014143} is an apocalyptic number.

21444343014143 is a deficient number, since it is larger than the sum of its proper divisors (3181749815041).

21444343014143 is a wasteful number, since it uses less digits than its factorization.

21444343014143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251062.

The product of its (nonzero) digits is 221184, while the sum is 38.

Adding to 21444343014143 its reverse (34141034344412), we get a palindrome (55585377358555).

The spelling of 21444343014143 in words is "twenty-one trillion, four hundred forty-four billion, three hundred forty-three million, fourteen thousand, one hundred forty-three".