130312020 has 96 divisors (see below), whose sum is σ = 385378560. Its totient is φ = 32834560.

The previous prime is 130312019. The next prime is 130312037. The reversal of 130312020 is 20213031.

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 = 130311987 and 130312005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122290 + ... + 123350.

It is an arithmetic number, because the mean of its divisors is an integer number (4014360).

Almost surely, 2^130312020 is an apocalyptic number.

130312020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 130312020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192689280).

130312020 is an abundant number, since it is smaller than the sum of its proper divisors (255066540).

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

130312020 is a wasteful number, since it uses less digits than its factorization.

130312020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185 (or 1183 counting only the distinct ones).

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

The square root of 130312020 is about 11415.4290326733. The cubic root of 130312020 is about 506.9846678292.

Adding to 130312020 its reverse (20213031), we get a palindrome (150525051).

It can be divided in two parts, 13031 and 2020, that added together give a palindrome (15051).

The spelling of 130312020 in words is "one hundred thirty million, three hundred twelve thousand, twenty".