204420347 has 4 divisors (see below), whose sum is σ = 204450000. Its totient is φ = 204390696.

The previous prime is 204420331. The next prime is 204420353. The reversal of 204420347 is 743024402.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 204420347 - 2⁴ = 204420331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204426347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1529 + ... + 20277.

It is an arithmetic number, because the mean of its divisors is an integer number (51112500).

Almost surely, 2^204420347 is an apocalyptic number.

204420347 is a deficient number, since it is larger than the sum of its proper divisors (29653).

204420347 is a wasteful number, since it uses less digits than its factorization.

204420347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29652.

The product of its (nonzero) digits is 5376, while the sum is 26.

The square root of 204420347 is about 14297.5643729972. The cubic root of 204420347 is about 589.0805817709.

Adding to 204420347 its reverse (743024402), we get a palindrome (947444749).

The spelling of 204420347 in words is "two hundred four million, four hundred twenty thousand, three hundred forty-seven".