204371347817 has 24 divisors (see below), whose sum is σ = 262945286856. Its totient is φ = 157330107648.

The previous prime is 204371347801. The next prime is 204371347837. The reversal of 204371347817 is 718743173402.

It can be written as a sum of positive squares in 4 ways, for example, as 58786366681 + 145584981136 = 242459^2 + 381556^2 .

It is not a de Polignac number, because 204371347817 - 2⁴ = 204371347801 is a prime.

It is a super-3 number, since 3×204371347817³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (204371347837) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4312028 + ... + 4359165.

It is an arithmetic number, because the mean of its divisors is an integer number (10956053619).

Almost surely, 2^204371347817 is an apocalyptic number.

It is an amenable number.

204371347817 is a deficient number, since it is larger than the sum of its proper divisors (58573939039).

204371347817 is a wasteful number, since it uses less digits than its factorization.

204371347817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8671257 (or 8671250 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 47.

The spelling of 204371347817 in words is "two hundred four billion, three hundred seventy-one million, three hundred forty-seven thousand, eight hundred seventeen".