203404401320 has 32 divisors (see below), whose sum is σ = 457715835720. Its totient is φ = 81351816960.

The previous prime is 203404401313. The next prime is 203404401323. The reversal of 203404401320 is 23104404302.

It can be written as a sum of positive squares in 4 ways, for example, as 78935150116 + 124469251204 = 280954^2 + 352802^2 .

It is not an unprimeable number, because it can be changed into a prime (203404401323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25130 + ... + 638310.

Almost surely, 2^203404401320 is an apocalyptic number.

203404401320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203404401320 is an abundant number, since it is smaller than the sum of its proper divisors (254311434400).

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

203404401320 is a wasteful number, since it uses less digits than its factorization.

203404401320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621485 (or 621481 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 203404401320 its reverse (23104404302), we get a palindrome (226508805622).

The spelling of 203404401320 in words is "two hundred three billion, four hundred four million, four hundred one thousand, three hundred twenty".