205008288421 has 8 divisors (see below), whose sum is σ = 205403968800. Its totient is φ = 204612991440.

The previous prime is 205008288409. The next prime is 205008288439. The reversal of 205008288421 is 124882800502.

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 205008288421 - 2¹⁷ = 205008157349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205008088421) 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, 986350 + ... + 1175968.

It is an arithmetic number, because the mean of its divisors is an integer number (25675496100).

Almost surely, 2^205008288421 is an apocalyptic number.

It is an amenable number.

205008288421 is a deficient number, since it is larger than the sum of its proper divisors (395680379).

205008288421 is a wasteful number, since it uses less digits than its factorization.

205008288421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191699.

The product of its (nonzero) digits is 81920, while the sum is 40.

The spelling of 205008288421 in words is "two hundred five billion, eight million, two hundred eighty-eight thousand, four hundred twenty-one".