1312030020 has 48 divisors (see below), whose sum is σ = 4198497408. Its totient is φ = 299892480.

The previous prime is 1312030007. The next prime is 1312030021. The reversal of 1312030020 is 200302131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1312029978 and 1312030005.

It is not an unprimeable number, because it can be changed into a prime (1312030021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1561521 + ... + 1562360.

It is an arithmetic number, because the mean of its divisors is an integer number (87468696).

Almost surely, 2^1312030020 is an apocalyptic number.

1312030020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312030020 is an abundant number, since it is smaller than the sum of its proper divisors (2886467388).

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

1312030020 is a wasteful number, since it uses less digits than its factorization.

1312030020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3123900 (or 3123898 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1312030020 is about 36221.9549444808. The cubic root of 1312030020 is about 1094.7490845192.

Adding to 1312030020 its reverse (200302131), we get a palindrome (1512332151).

The spelling of 1312030020 in words is "one billion, three hundred twelve million, thirty thousand, twenty".