204240414214421 has 16 divisors (see below), whose sum is σ = 232895188283184. Its totient is φ = 177435318779904.

The previous prime is 204240414214393. The next prime is 204240414214423. The reversal of 204240414214421 is 124412414042402.

It can be written as a sum of positive squares in 8 ways, for example, as 14297579313796 + 189942834900625 = 3781214^2 + 13781975^2 .

It is a cyclic number.

It is not a de Polignac number, because 204240414214421 - 2¹⁰ = 204240414213397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204240414214423) 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 15 ways as a sum of consecutive naturals, for example, 2121740 + ... + 20321973.

It is an arithmetic number, because the mean of its divisors is an integer number (14555949267699).

Almost surely, 2^{204240414214421} is an apocalyptic number.

It is an amenable number.

204240414214421 is a deficient number, since it is larger than the sum of its proper divisors (28654774068763).

204240414214421 is a wasteful number, since it uses less digits than its factorization.

204240414214421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22484920.

The product of its (nonzero) digits is 65536, while the sum is 35.

Adding to 204240414214421 its reverse (124412414042402), we get a palindrome (328652828256823).

The spelling of 204240414214421 in words is "two hundred four trillion, two hundred forty billion, four hundred fourteen million, two hundred fourteen thousand, four hundred twenty-one".