203305043004 has 96 divisors (see below), whose sum is σ = 558043315200. Its totient is φ = 56390971392.

The previous prime is 203305042991. The next prime is 203305043021. The reversal of 203305043004 is 400340503302.

It is a congruent number.

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, 1322649 + ... + 1468335.

It is an arithmetic number, because the mean of its divisors is an integer number (5812951200).

Almost surely, 2^203305043004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203305043004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279021657600).

203305043004 is an abundant number, since it is smaller than the sum of its proper divisors (354738272196).

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

203305043004 is a wasteful number, since it uses less digits than its factorization.

203305043004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146187 (or 146185 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 24.

Adding to 203305043004 its reverse (400340503302), we get a palindrome (603645546306).

The spelling of 203305043004 in words is "two hundred three billion, three hundred five million, forty-three thousand, four".