21452435134441 has 8 divisors (see below), whose sum is σ = 21869375695200. Its totient is φ = 21037272572640.

The previous prime is 21452435134433. The next prime is 21452435134453. The reversal of 21452435134441 is 14443153425412.

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

It is a cyclic number.

It is not a de Polignac number, because 21452435134441 - 2³ = 21452435134433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21452435135441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444475375 + ... + 444523636.

It is an arithmetic number, because the mean of its divisors is an integer number (2733671961900).

Almost surely, 2^{21452435134441} is an apocalyptic number.

It is an amenable number.

21452435134441 is a deficient number, since it is larger than the sum of its proper divisors (416940560759).

21452435134441 is an equidigital number, since it uses as much as digits as its factorization.

21452435134441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888999479.

The product of its digits is 921600, while the sum is 43.

Adding to 21452435134441 its reverse (14443153425412), we get a palindrome (35895588559853).

The spelling of 21452435134441 in words is "twenty-one trillion, four hundred fifty-two billion, four hundred thirty-five million, one hundred thirty-four thousand, four hundred forty-one".