21441554450353 has 8 divisors (see below), whose sum is σ = 21951181916928. Its totient is φ = 20932426377744.

The previous prime is 21441554450311. The next prime is 21441554450357. The reversal of 21441554450353 is 35305445514412.

It is a happy number.

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 21441554450353 - 2¹⁷ = 21441554319281 is a prime.

It is a super-4 number, since 4×21441554450353⁴ (a number of 54 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21441554450357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124761601 + ... + 124933342.

It is an arithmetic number, because the mean of its divisors is an integer number (2743897739616).

Almost surely, 2^{21441554450353} is an apocalyptic number.

It is an amenable number.

21441554450353 is a deficient number, since it is larger than the sum of its proper divisors (509627466575).

21441554450353 is a wasteful number, since it uses less digits than its factorization.

21441554450353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249696983.

The product of its (nonzero) digits is 2880000, while the sum is 46.

Adding to 21441554450353 its reverse (35305445514412), we get a palindrome (56746999964765).

The spelling of 21441554450353 in words is "twenty-one trillion, four hundred forty-one billion, five hundred fifty-four million, four hundred fifty thousand, three hundred fifty-three".