203403423040 has 28 divisors (see below), whose sum is σ = 484354401876. Its totient is φ = 81361369088.

The previous prime is 203403423037. The next prime is 203403423107. The reversal of 203403423040 is 40324304302.

It can be written as a sum of positive squares in 2 ways, for example, as 65245506624 + 138157916416 = 255432^2 + 371696^2 .

It is a junction number, because it is equal to n+sod(n) for n = 203403422996 and 203403423014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317817529 + ... + 317818168.

Almost surely, 2^203403423040 is an apocalyptic number.

203403423040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203403423040 is an abundant number, since it is smaller than the sum of its proper divisors (280950978836).

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

203403423040 is an equidigital number, since it uses as much as digits as its factorization.

203403423040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635635714 (or 635635704 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 25.

Adding to 203403423040 its reverse (40324304302), we get a palindrome (243727727342).

The spelling of 203403423040 in words is "two hundred three billion, four hundred three million, four hundred twenty-three thousand, forty".