8130020 has 12 divisors (see below), whose sum is σ = 17073084. Its totient is φ = 3252000.

The previous prime is 8130007. The next prime is 8130071. The reversal of 8130020 is 200318.

It can be written as a sum of positive squares in 2 ways, for example, as 5053504 + 3076516 = 2248^2 + 1754^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 8129977 and 8130004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203231 + ... + 203270.

It is an arithmetic number, because the mean of its divisors is an integer number (1422757).

Almost surely, 2^8130020 is an apocalyptic number.

It is an amenable number.

8130020 is an abundant number, since it is smaller than the sum of its proper divisors (8943064).

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

8130020 is a wasteful number, since it uses less digits than its factorization.

8130020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406510 (or 406508 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 8130020 is about 2851.3189930276. The cubic root of 8130020 is about 201.0776825712.

Adding to 8130020 its reverse (200318), we get a palindrome (8330338).

The spelling of 8130020 in words is "eight million, one hundred thirty thousand, twenty".