21454500422441 has 4 divisors (see below), whose sum is σ = 21454589838672. Its totient is φ = 21454411006212.

The previous prime is 21454500422423. The next prime is 21454500422447. The reversal of 21454500422441 is 14422400545412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21454500422441 - 2³⁸ = 21179622515497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21454500422395 and 21454500422404.

It is not an unprimeable number, because it can be changed into a prime (21454500422447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44347235 + ... + 44828408.

It is an arithmetic number, because the mean of its divisors is an integer number (5363647459668).

Almost surely, 2^{21454500422441} is an apocalyptic number.

It is an amenable number.

21454500422441 is a deficient number, since it is larger than the sum of its proper divisors (89416231).

21454500422441 is an equidigital number, since it uses as much as digits as its factorization.

21454500422441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89416230.

The product of its (nonzero) digits is 204800, while the sum is 38.

Adding to 21454500422441 its reverse (14422400545412), we get a palindrome (35876900967853).

The spelling of 21454500422441 in words is "twenty-one trillion, four hundred fifty-four billion, five hundred million, four hundred twenty-two thousand, four hundred forty-one".