21444022205355 has 8 divisors (see below), whose sum is σ = 34310435528592. Its totient is φ = 11436811842848.

The previous prime is 21444022205321. The next prime is 21444022205363. The reversal of 21444022205355 is 55350222044412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21444022205355 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 714800740164 + ... + 714800740193.

It is an arithmetic number, because the mean of its divisors is an integer number (4288804441074).

Almost surely, 2^{21444022205355} is an apocalyptic number.

21444022205355 is a deficient number, since it is larger than the sum of its proper divisors (12866413323237).

21444022205355 is a wasteful number, since it uses less digits than its factorization.

21444022205355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429601480365.

The product of its (nonzero) digits is 384000, while the sum is 39.

Adding to 21444022205355 its reverse (55350222044412), we get a palindrome (76794244249767).

The spelling of 21444022205355 in words is "twenty-one trillion, four hundred forty-four billion, twenty-two million, two hundred five thousand, three hundred fifty-five".