203123434203 has 24 divisors (see below), whose sum is σ = 306208245408. Its totient is φ = 129506332032.

The previous prime is 203123434201. The next prime is 203123434243. The reversal of 203123434203 is 302434321302.

203123434203 is a `hidden beast` number, since 2 + 0 + 3 + 1 + 23 + 434 + 203 = 666.

It is not a de Polignac number, because 203123434203 - 2¹ = 203123434201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203123434201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1208001 + ... + 1365837.

It is an arithmetic number, because the mean of its divisors is an integer number (12758676892).

Almost surely, 2^203123434203 is an apocalyptic number.

203123434203 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

203123434203 is a deficient number, since it is larger than the sum of its proper divisors (103084811205).

203123434203 is a wasteful number, since it uses less digits than its factorization.

203123434203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164083 (or 164080 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 203123434203 its reverse (302434321302), we get a palindrome (505557755505).

The spelling of 203123434203 in words is "two hundred three billion, one hundred twenty-three million, four hundred thirty-four thousand, two hundred three".