130730020 has 24 divisors (see below), whose sum is σ = 275325624. Its totient is φ = 52141056.

The previous prime is 130730011. The next prime is 130730021. The reversal of 130730020 is 20037031.

It can be written as a sum of positive squares in 4 ways, for example, as 3356224 + 127373796 = 1832^2 + 11286^2 .

It is a junction number, because it is equal to n+sod(n) for n = 130729976 and 130730003.

It is not an unprimeable number, because it can be changed into a prime (130730021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2199 + ... + 16318.

It is an arithmetic number, because the mean of its divisors is an integer number (11471901).

Almost surely, 2^130730020 is an apocalyptic number.

130730020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130730020 is an abundant number, since it is smaller than the sum of its proper divisors (144595604).

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

130730020 is a wasteful number, since it uses less digits than its factorization.

130730020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18879 (or 18877 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 130730020 is about 11433.7229282504. The cubic root of 130730020 is about 507.5261717355.

Adding to 130730020 its reverse (20037031), we get a palindrome (150767051).

The spelling of 130730020 in words is "one hundred thirty million, seven hundred thirty thousand, twenty".