1320440303403 has 12 divisors (see below), whose sum is σ = 2054018249920. Its totient is φ = 812578648176.

The previous prime is 1320440303393. The next prime is 1320440303431. The reversal of 1320440303403 is 3043030440231.

1320440303403 is a `hidden beast` number, since 13 + 204 + 40 + 3 + 0 + 3 + 403 = 666.

It is not a de Polignac number, because 1320440303403 - 2¹² = 1320440299307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1320440303003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5642907163 + ... + 5642907396.

Almost surely, 2^{1320440303403} is an apocalyptic number.

1320440303403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1320440303403 is a deficient number, since it is larger than the sum of its proper divisors (733577946517).

1320440303403 is a wasteful number, since it uses less digits than its factorization.

1320440303403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11285814578 (or 11285814575 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 1320440303403 its reverse (3043030440231), we get a palindrome (4363470743634).

The spelling of 1320440303403 in words is "one trillion, three hundred twenty billion, four hundred forty million, three hundred three thousand, four hundred three".