205021403404144 has 20 divisors (see below), whose sum is σ = 397324525868424. Its totient is φ = 102486041889728.

The previous prime is 205021403404123. The next prime is 205021403404183. The reversal of 205021403404144 is 441404304120502.

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 3 ways as a sum of consecutive naturals, for example, 1541169682 + ... + 1541302705.

Almost surely, 2^{205021403404144} is an apocalyptic number.

It is an amenable number.

205021403404144 is a deficient number, since it is larger than the sum of its proper divisors (192303122464280).

205021403404144 is a wasteful number, since it uses less digits than its factorization.

205021403404144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3082476552 (or 3082476546 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 34.

Adding to 205021403404144 its reverse (441404304120502), we get a palindrome (646425707524646).

The spelling of 205021403404144 in words is "two hundred five trillion, twenty-one billion, four hundred three million, four hundred four thousand, one hundred forty-four".