204021841639 has 32 divisors (see below), whose sum is σ = 260742343680. Its totient is φ = 154997318400.

The previous prime is 204021841631. The next prime is 204021841643. The reversal of 204021841639 is 936148120402.

It is not a de Polignac number, because 204021841639 - 2³ = 204021841631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204021841631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4901037 + ... + 4942489.

It is an arithmetic number, because the mean of its divisors is an integer number (8148198240).

Almost surely, 2^204021841639 is an apocalyptic number.

204021841639 is a deficient number, since it is larger than the sum of its proper divisors (56720502041).

204021841639 is a wasteful number, since it uses less digits than its factorization.

204021841639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43071.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 204021841639 in words is "two hundred four billion, twenty-one million, eight hundred forty-one thousand, six hundred thirty-nine".