1313270020 has 12 divisors (see below), whose sum is σ = 2757867084. Its totient is φ = 525308000.

The previous prime is 1313269943. The next prime is 1313270029. The reversal of 1313270020 is 200723131.

It can be written as a sum of positive squares in 2 ways, for example, as 163788804 + 1149481216 = 12798^2 + 33904^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1313270020.

It is not an unprimeable number, because it can be changed into a prime (1313270029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32831731 + ... + 32831770.

It is an arithmetic number, because the mean of its divisors is an integer number (229822257).

Almost surely, 2^1313270020 is an apocalyptic number.

1313270020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1313270020 is an abundant number, since it is smaller than the sum of its proper divisors (1444597064).

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

1313270020 is a wasteful number, since it uses less digits than its factorization.

1313270020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65663510 (or 65663508 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 1313270020 is about 36239.0675928617. The cubic root of 1313270020 is about 1095.0938584990.

Adding to 1313270020 its reverse (200723131), we get a palindrome (1513993151).

The spelling of 1313270020 in words is "one billion, three hundred thirteen million, two hundred seventy thousand, twenty".