1320311018 has 64 divisors (see below), whose sum is σ = 2349139968. Its totient is φ = 550748160.

The previous prime is 1320311017. The next prime is 1320311039. The reversal of 1320311018 is 8101130231.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1320311011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2287946 + ... + 2288522.

It is an arithmetic number, because the mean of its divisors is an integer number (36705312).

Almost surely, 2^1320311018 is an apocalyptic number.

1320311018 is a deficient number, since it is larger than the sum of its proper divisors (1028828950).

1320311018 is a wasteful number, since it uses less digits than its factorization.

1320311018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1320311018 is about 36336.0842414259. The cubic root of 1320311018 is about 1097.0474589513.

Adding to 1320311018 its reverse (8101130231), we get a palindrome (9421441249).

The spelling of 1320311018 in words is "one billion, three hundred twenty million, three hundred eleven thousand, eighteen".