203123312004 has 24 divisors (see below), whose sum is σ = 494561108160. Its totient is φ = 64763954464.

The previous prime is 203123312003. The next prime is 203123312009. The reversal of 203123312004 is 400213321302.

203123312004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (203123312003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367976739 + ... + 367977290.

It is an arithmetic number, because the mean of its divisors is an integer number (20606712840).

Almost surely, 2^203123312004 is an apocalyptic number.

It is an amenable number.

203123312004 is an abundant number, since it is smaller than the sum of its proper divisors (291437796156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203123312004 is a wasteful number, since it uses less digits than its factorization.

203123312004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735954059 (or 735954057 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 203123312004 its reverse (400213321302), we get a palindrome (603336633306).

The spelling of 203123312004 in words is "two hundred three billion, one hundred twenty-three million, three hundred twelve thousand, four".