21440241655435 has 8 divisors (see below), whose sum is σ = 25732950097536. Its totient is φ = 17149086583680.

The previous prime is 21440241655429. The next prime is 21440241655457. The reversal of 21440241655435 is 53455614204412.

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

It is not a de Polignac number, because 21440241655435 - 2³⁵ = 21405881917067 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388312219 + ... + 388367428.

It is an arithmetic number, because the mean of its divisors is an integer number (3216618762192).

Almost surely, 2^{21440241655435} is an apocalyptic number.

21440241655435 is a deficient number, since it is larger than the sum of its proper divisors (4292708442101).

21440241655435 is an equidigital number, since it uses as much as digits as its factorization.

21440241655435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776685173.

The product of its (nonzero) digits is 2304000, while the sum is 46.

Adding to 21440241655435 its reverse (53455614204412), we get a palindrome (74895855859847).

The spelling of 21440241655435 in words is "twenty-one trillion, four hundred forty billion, two hundred forty-one million, six hundred fifty-five thousand, four hundred thirty-five".