204054403999 has 4 divisors (see below), whose sum is σ = 210636804160. Its totient is φ = 197472003840.

The previous prime is 204054403997. The next prime is 204054404093. The reversal of 204054403999 is 999304450402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999304450402 = 2 ⋅499652225201.

It is not a de Polignac number, because 204054403999 - 2¹ = 204054403997 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 (204054403997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3291200034 + ... + 3291200095.

It is an arithmetic number, because the mean of its divisors is an integer number (52659201040).

Almost surely, 2^204054403999 is an apocalyptic number.

204054403999 is a deficient number, since it is larger than the sum of its proper divisors (6582400161).

204054403999 is an equidigital number, since it uses as much as digits as its factorization.

204054403999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6582400160.

The product of its (nonzero) digits is 1399680, while the sum is 49.

The spelling of 204054403999 in words is "two hundred four billion, fifty-four million, four hundred three thousand, nine hundred ninety-nine".