203045000040 has 192 divisors, whose sum is σ = 695275626240. Its totient is φ = 51288145920.

The previous prime is 203044999897. The next prime is 203045000047. The reversal of 203045000040 is 40000540302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 203044999977 and 203045000022.

It is not an unprimeable number, because it can be changed into a prime (203045000047) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 733800 + ... + 971880.

It is an arithmetic number, because the mean of its divisors is an integer number (3621227220).

Almost surely, 2^203045000040 is an apocalyptic number.

203045000040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203045000040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (347637813120).

203045000040 is an abundant number, since it is smaller than the sum of its proper divisors (492230626200).

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

203045000040 is a wasteful number, since it uses less digits than its factorization.

203045000040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238224 (or 238217 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

Adding to 203045000040 its reverse (40000540302), we get a palindrome (243045540342).

The spelling of 203045000040 in words is "two hundred three billion, forty-five million, forty", and thus it is an aban number.