204305634819 has 96 divisors (see below), whose sum is σ = 366210324480. Its totient is φ = 108036633600.

The previous prime is 204305634817. The next prime is 204305634851. The reversal of 204305634819 is 918436503402.

204305634819 is a `hidden beast` number, since 2 + 0 + 4 + 3 + 0 + 5 + 634 + 8 + 1 + 9 = 666.

It is not a de Polignac number, because 204305634819 - 2¹ = 204305634817 is a prime.

It is a super-2 number, since 2×204305634819² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (204305634817) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1656027 + ... + 1775115.

It is an arithmetic number, because the mean of its divisors is an integer number (3814690880).

Almost surely, 2^204305634819 is an apocalyptic number.

204305634819 is a deficient number, since it is larger than the sum of its proper divisors (161904689661).

204305634819 is a wasteful number, since it uses less digits than its factorization.

204305634819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119193 (or 119190 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 204305634819 in words is "two hundred four billion, three hundred five million, six hundred thirty-four thousand, eight hundred nineteen".