204210342166 has 4 divisors (see below), whose sum is σ = 306315513252. Its totient is φ = 102105171082.

The previous prime is 204210342163. The next prime is 204210342181. The reversal of 204210342166 is 661243012402.

204210342166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204210342163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51052585540 + ... + 51052585543.

It is an arithmetic number, because the mean of its divisors is an integer number (76578878313).

Almost surely, 2^204210342166 is an apocalyptic number.

204210342166 is a deficient number, since it is larger than the sum of its proper divisors (102105171086).

204210342166 is a wasteful number, since it uses less digits than its factorization.

204210342166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102105171085.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 204210342166 its reverse (661243012402), we get a palindrome (865453354568).

The spelling of 204210342166 in words is "two hundred four billion, two hundred ten million, three hundred forty-two thousand, one hundred sixty-six".