203404000040 has 16 divisors (see below), whose sum is σ = 457659000180. Its totient is φ = 81361600000.

The previous prime is 203404000039. The next prime is 203404000057. The reversal of 203404000040 is 40000404302.

It can be written as a sum of positive squares in 2 ways, for example, as 199993206436 + 3410793604 = 447206^2 + 58402^2 .

It is a junction number, because it is equal to n+sod(n) for n = 203403999982 and 203404000018.

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, 2542549961 + ... + 2542550040.

Almost surely, 2^203404000040 is an apocalyptic number.

203404000040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203404000040 is an abundant number, since it is smaller than the sum of its proper divisors (254255000140).

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

203404000040 is a wasteful number, since it uses less digits than its factorization.

203404000040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5085100012 (or 5085100008 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

Adding to 203404000040 its reverse (40000404302), we get a palindrome (243404404342).

The spelling of 203404000040 in words is "two hundred three billion, four hundred four million, forty", and thus it is an aban number.