204123413 has 16 divisors (see below), whose sum is σ = 235595136. Its totient is φ = 175348800.

The previous prime is 204123401. The next prime is 204123427. The reversal of 204123413 is 314321402.

It is a cyclic number.

It is not a de Polignac number, because 204123413 - 2⁶ = 204123349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204123463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1838 + ... + 20288.

It is an arithmetic number, because the mean of its divisors is an integer number (14724696).

Almost surely, 2^204123413 is an apocalyptic number.

204123413 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

204123413 is a deficient number, since it is larger than the sum of its proper divisors (31471723).

204123413 is a wasteful number, since it uses less digits than its factorization.

204123413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18524.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 204123413 is about 14287.1765230223. The cubic root of 204123413 is about 588.7952174586.

Adding to 204123413 its reverse (314321402), we get a palindrome (518444815).

The spelling of 204123413 in words is "two hundred four million, one hundred twenty-three thousand, four hundred thirteen".