204007287818 has 4 divisors (see below), whose sum is σ = 306010931730. Its totient is φ = 102003643908.

The previous prime is 204007287779. The next prime is 204007287853. The reversal of 204007287818 is 818782700402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 176212729729 + 27794558089 = 419777^2 + 166717^2 .

It is a super-2 number, since 2×204007287818² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51001821953 + ... + 51001821956.

Almost surely, 2^204007287818 is an apocalyptic number.

204007287818 is a deficient number, since it is larger than the sum of its proper divisors (102003643912).

204007287818 is a wasteful number, since it uses less digits than its factorization.

204007287818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102003643911.

The product of its (nonzero) digits is 401408, while the sum is 47.

The spelling of 204007287818 in words is "two hundred four billion, seven million, two hundred eighty-seven thousand, eight hundred eighteen".