1311300020 has 12 divisors (see below), whose sum is σ = 2753730084. Its totient is φ = 524520000.

The previous prime is 1311300013. The next prime is 1311300059. The reversal of 1311300020 is 200031131.

It can be written as a sum of positive squares in 2 ways, for example, as 870132004 + 441168016 = 29498^2 + 21004^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1311299974 and 1311300010.

It is a congruent number.

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, 32782481 + ... + 32782520.

It is an arithmetic number, because the mean of its divisors is an integer number (229477507).

Almost surely, 2^1311300020 is an apocalyptic number.

1311300020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311300020 is an abundant number, since it is smaller than the sum of its proper divisors (1442430064).

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

1311300020 is a wasteful number, since it uses less digits than its factorization.

1311300020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65565010 (or 65565008 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1311300020 is about 36211.8767809679. The cubic root of 1311300020 is about 1094.5460111440.

Adding to 1311300020 its reverse (200031131), we get a palindrome (1511331151).

The spelling of 1311300020 in words is "one billion, three hundred eleven million, three hundred thousand, twenty".