1312323020 has 24 divisors (see below), whose sum is σ = 2819970384. Its totient is φ = 512721216.

The previous prime is 1312322987. The next prime is 1312323059. The reversal of 1312323020 is 203232131.

It is a self number, because there is not a number n which added to its sum of digits gives 1312323020.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 762119 + ... + 763838.

It is an arithmetic number, because the mean of its divisors is an integer number (117498766).

Almost surely, 2^1312323020 is an apocalyptic number.

1312323020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312323020 is an abundant number, since it is smaller than the sum of its proper divisors (1507647364).

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

1312323020 is a wasteful number, since it uses less digits than its factorization.

1312323020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526009 (or 1526007 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1312323020 is about 36225.9992270745. Note that the first 3 decimals coincide. The cubic root of 1312323020 is about 1094.8305708680.

Adding to 1312323020 its reverse (203232131), we get a palindrome (1515555151).

The spelling of 1312323020 in words is "one billion, three hundred twelve million, three hundred twenty-three thousand, twenty".