30020185 has 16 divisors (see below), whose sum is σ = 39012624. Its totient is φ = 22044672.

The previous prime is 30020173. The next prime is 30020189. The reversal of 30020185 is 58102003.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 13111641 + 16908544 = 3621^2 + 4112^2 .

It is not a de Polignac number, because 30020185 - 2⁹ = 30019673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30020189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11349 + ... + 13741.

It is an arithmetic number, because the mean of its divisors is an integer number (2438289).

Almost surely, 2^30020185 is an apocalyptic number.

It is an amenable number.

30020185 is a deficient number, since it is larger than the sum of its proper divisors (8992439).

30020185 is a wasteful number, since it uses less digits than its factorization.

30020185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2604.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 30020185 is about 5479.0678951807. The cubic root of 30020185 is about 310.7929232918.

Adding to 30020185 its reverse (58102003), we get a palindrome (88122188).

The spelling of 30020185 in words is "thirty million, twenty thousand, one hundred eighty-five".