1316803818 has 48 divisors (see below), whose sum is σ = 2898167904. Its totient is φ = 395569440.

The previous prime is 1316803801. The next prime is 1316803819. The reversal of 1316803818 is 8183086131.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1316803819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1063896 + ... + 1065132.

It is an arithmetic number, because the mean of its divisors is an integer number (60378498).

Almost surely, 2^1316803818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1316803818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1449083952).

1316803818 is an abundant number, since it is smaller than the sum of its proper divisors (1581364086).

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

1316803818 is a wasteful number, since it uses less digits than its factorization.

1316803818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507 (or 1380 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 1316803818 is about 36287.7915833962. The cubic root of 1316803818 is about 1096.0752191658.

Adding to 1316803818 its reverse (8183086131), we get a palindrome (9499889949).

The spelling of 1316803818 in words is "one billion, three hundred sixteen million, eight hundred three thousand, eight hundred eighteen".