204628358921 has 8 divisors (see below), whose sum is σ = 237694768704. Its totient is φ = 172520395920.

The previous prime is 204628358917. The next prime is 204628358923. The reversal of 204628358921 is 129853826402.

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 204628358921 - 2² = 204628358917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204628358921.

It is not an unprimeable number, because it can be changed into a prime (204628358923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239611235 + ... + 239612088.

It is an arithmetic number, because the mean of its divisors is an integer number (29711846088).

Almost surely, 2^204628358921 is an apocalyptic number.

It is an amenable number.

204628358921 is a deficient number, since it is larger than the sum of its proper divisors (33066409783).

204628358921 is an equidigital number, since it uses as much as digits as its factorization.

204628358921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479223391.

The product of its (nonzero) digits is 1658880, while the sum is 50.

The spelling of 204628358921 in words is "two hundred four billion, six hundred twenty-eight million, three hundred fifty-eight thousand, nine hundred twenty-one".