204243154205 has 16 divisors (see below), whose sum is σ = 259328118720. Its totient is φ = 153992752128.

The previous prime is 204243154201. The next prime is 204243154217. The reversal of 204243154205 is 502451342402.

It is a cyclic number.

It is not a de Polignac number, because 204243154205 - 2² = 204243154201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204243154201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5551427 + ... + 5588096.

It is an arithmetic number, because the mean of its divisors is an integer number (16208007420).

Almost surely, 2^204243154205 is an apocalyptic number.

It is an amenable number.

204243154205 is a deficient number, since it is larger than the sum of its proper divisors (55084964515).

204243154205 is a wasteful number, since it uses less digits than its factorization.

204243154205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11139740.

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 204243154205 its reverse (502451342402), we get a palindrome (706694496607).

The spelling of 204243154205 in words is "two hundred four billion, two hundred forty-three million, one hundred fifty-four thousand, two hundred five".