2005454444421 has 8 divisors (see below), whose sum is σ = 2674042711360. Its totient is φ = 1336917903552.

The previous prime is 2005454444377. The next prime is 2005454444437. The reversal of 2005454444421 is 1244444545002.

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

It is not a de Polignac number, because 2005454444421 - 2¹⁷ = 2005454313349 is a prime.

It is a super-3 number, since 3×2005454444421³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2005454444421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005454444471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12840961 + ... + 12996198.

It is an arithmetic number, because the mean of its divisors is an integer number (334255338920).

Almost surely, 2^{2005454444421} is an apocalyptic number.

It is an amenable number.

2005454444421 is a deficient number, since it is larger than the sum of its proper divisors (668588266939).

2005454444421 is a wasteful number, since it uses less digits than its factorization.

2005454444421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25863035.

The product of its (nonzero) digits is 409600, while the sum is 39.

Adding to 2005454444421 its reverse (1244444545002), we get a palindrome (3249898989423).

The spelling of 2005454444421 in words is "two trillion, five billion, four hundred fifty-four million, four hundred forty-four thousand, four hundred twenty-one".