204103123545 has 32 divisors (see below), whose sum is σ = 331992501120. Its totient is φ = 107046627840.

The previous prime is 204103123519. The next prime is 204103123607. The reversal of 204103123545 is 545321301402.

It is not a de Polignac number, because 204103123545 - 2¹² = 204103119449 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4540741 + ... + 4585469.

It is an arithmetic number, because the mean of its divisors is an integer number (10374765660).

Almost surely, 2^204103123545 is an apocalyptic number.

It is an amenable number.

204103123545 is a deficient number, since it is larger than the sum of its proper divisors (127889377575).

204103123545 is a wasteful number, since it uses less digits than its factorization.

204103123545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49785.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 204103123545 its reverse (545321301402), we get a palindrome (749424424947).

The spelling of 204103123545 in words is "two hundred four billion, one hundred three million, one hundred twenty-three thousand, five hundred forty-five".