204445434387 has 8 divisors (see below), whose sum is σ = 273599795200. Its totient is φ = 135794014920.

The previous prime is 204445434379. The next prime is 204445434433. The reversal of 204445434387 is 783434544402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 204445434387 - 2³ = 204445434379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204445434377) 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, 125734387 + ... + 125736012.

It is an arithmetic number, because the mean of its divisors is an integer number (34199974400).

Almost surely, 2^204445434387 is an apocalyptic number.

204445434387 is a deficient number, since it is larger than the sum of its proper divisors (69154360813).

204445434387 is a wasteful number, since it uses less digits than its factorization.

204445434387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251470673.

The product of its (nonzero) digits is 5160960, while the sum is 48.

Adding to 204445434387 its reverse (783434544402), we get a palindrome (987879978789).

The spelling of 204445434387 in words is "two hundred four billion, four hundred forty-five million, four hundred thirty-four thousand, three hundred eighty-seven".