21452435134439 has 8 divisors (see below), whose sum is σ = 21804187941168. Its totient is φ = 21100684700160.

The previous prime is 21452435134433. The next prime is 21452435134453. The reversal of 21452435134439 is 93443153425412.

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 21452435134439 - 2³² = 21448140167143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21452435134433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35378084 + ... + 35979350.

It is an arithmetic number, because the mean of its divisors is an integer number (2725523492646).

Almost surely, 2^{21452435134439} is an apocalyptic number.

21452435134439 is a deficient number, since it is larger than the sum of its proper divisors (351752806729).

21452435134439 is an equidigital number, since it uses as much as digits as its factorization.

21452435134439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186225.

The product of its digits is 6220800, while the sum is 50.

The spelling of 21452435134439 in words is "twenty-one trillion, four hundred fifty-two billion, four hundred thirty-five million, one hundred thirty-four thousand, four hundred thirty-nine".