204022399987 has 16 divisors (see below), whose sum is σ = 233505267712. Its totient is φ = 174623934240.

The previous prime is 204022399979. The next prime is 204022399993. The reversal of 204022399987 is 789993220402.

It is not a de Polignac number, because 204022399987 - 2³ = 204022399979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204022399957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14892913 + ... + 14906605.

It is an arithmetic number, because the mean of its divisors is an integer number (14594079232).

Almost surely, 2^204022399987 is an apocalyptic number.

204022399987 is a deficient number, since it is larger than the sum of its proper divisors (29482867725).

204022399987 is a wasteful number, since it uses less digits than its factorization.

204022399987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16618.

The product of its (nonzero) digits is 3919104, while the sum is 55.

The spelling of 204022399987 in words is "two hundred four billion, twenty-two million, three hundred ninety-nine thousand, nine hundred eighty-seven".