21440223360335 has 16 divisors (see below), whose sum is σ = 27709841048736. Its totient is φ = 15831365770368.

The previous prime is 21440223360317. The next prime is 21440223360371. The reversal of 21440223360335 is 53306332204412.

It is a cyclic number.

It is not a de Polignac number, because 21440223360335 - 2³⁰ = 21439149618511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14001569 + ... + 15457178.

It is an arithmetic number, because the mean of its divisors is an integer number (1731865065546).

Almost surely, 2^{21440223360335} is an apocalyptic number.

21440223360335 is a deficient number, since it is larger than the sum of its proper divisors (6269617688401).

21440223360335 is a wasteful number, since it uses less digits than its factorization.

21440223360335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29469962.

The product of its (nonzero) digits is 311040, while the sum is 38.

Adding to 21440223360335 its reverse (53306332204412), we get a palindrome (74746555564747).

The spelling of 21440223360335 in words is "twenty-one trillion, four hundred forty billion, two hundred twenty-three million, three hundred sixty thousand, three hundred thirty-five".