204413611123 has 4 divisors (see below), whose sum is σ = 205020180040. Its totient is φ = 203807042208.

The previous prime is 204413611121. The next prime is 204413611151. The reversal of 204413611123 is 321116314402.

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

It is a cyclic number.

It is not a de Polignac number, because 204413611123 - 2¹ = 204413611121 is a prime.

It is a super-2 number, since 2×204413611123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204413611091 and 204413611100.

It is not an unprimeable number, because it can be changed into a prime (204413611121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303283953 + ... + 303284626.

It is an arithmetic number, because the mean of its divisors is an integer number (51255045010).

Almost surely, 2^204413611123 is an apocalyptic number.

204413611123 is a deficient number, since it is larger than the sum of its proper divisors (606568917).

204413611123 is an equidigital number, since it uses as much as digits as its factorization.

204413611123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606568916.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 204413611123 its reverse (321116314402), we get a palindrome (525529925525).

The spelling of 204413611123 in words is "two hundred four billion, four hundred thirteen million, six hundred eleven thousand, one hundred twenty-three".