203103305645 has 16 divisors (see below), whose sum is σ = 246937299840. Its totient is φ = 160351973184.

The previous prime is 203103305623. The next prime is 203103305651. The reversal of 203103305645 is 546503301302.

It is a cyclic number.

It is not a de Polignac number, because 203103305645 - 2³⁰ = 202029563821 is a prime.

It is a super-3 number, since 3×203103305645³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 581030 + ... + 862439.

It is an arithmetic number, because the mean of its divisors is an integer number (15433581240).

Almost surely, 2^203103305645 is an apocalyptic number.

It is an amenable number.

203103305645 is a deficient number, since it is larger than the sum of its proper divisors (43833994195).

203103305645 is a wasteful number, since it uses less digits than its factorization.

203103305645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443844.

The product of its (nonzero) digits is 32400, while the sum is 32.

Adding to 203103305645 its reverse (546503301302), we get a palindrome (749606606947).

The spelling of 203103305645 in words is "two hundred three billion, one hundred three million, three hundred five thousand, six hundred forty-five".