204818699249 has 2 divisors, whose sum is σ = 204818699250. Its totient is φ = 204818699248.

The previous prime is 204818699219. The next prime is 204818699263. The reversal of 204818699249 is 942996818402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134254089649 + 70564609600 = 366407^2 + 265640^2 .

It is a cyclic number.

It is not a de Polignac number, because 204818699249 - 2³⁶ = 136099222513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204818699191 and 204818699200.

It is not a weakly prime, because it can be changed into another prime (204818699219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102409349624 + 102409349625.

It is an arithmetic number, because the mean of its divisors is an integer number (102409349625).

Almost surely, 2^204818699249 is an apocalyptic number.

It is an amenable number.

204818699249 is a deficient number, since it is larger than the sum of its proper divisors (1).

204818699249 is an equidigital number, since it uses as much as digits as its factorization.

204818699249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17915904, while the sum is 62.

The spelling of 204818699249 in words is "two hundred four billion, eight hundred eighteen million, six hundred ninety-nine thousand, two hundred forty-nine".