130020305 has 4 divisors (see below), whose sum is σ = 156024372. Its totient is φ = 104016240.

The previous prime is 130020281. The next prime is 130020313. The reversal of 130020305 is 503020031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 503020031 = 14243 ⋅35317.

It can be written as a sum of positive squares in 2 ways, for example, as 99062209 + 30958096 = 9953^2 + 5564^2 .

It is not a de Polignac number, because 130020305 - 2¹² = 130016209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 130020305.

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, 13002026 + ... + 13002035.

It is an arithmetic number, because the mean of its divisors is an integer number (39006093).

Almost surely, 2^130020305 is an apocalyptic number.

It is an amenable number.

130020305 is a deficient number, since it is larger than the sum of its proper divisors (26004067).

130020305 is an equidigital number, since it uses as much as digits as its factorization.

130020305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26004066.

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 130020305 is about 11402.6446493785. The cubic root of 130020305 is about 506.6060751546.

Adding to 130020305 its reverse (503020031), we get a palindrome (633040336).

The spelling of 130020305 in words is "one hundred thirty million, twenty thousand, three hundred five".