19530085 has 4 divisors (see below), whose sum is σ = 23436108. Its totient is φ = 15624064.

The previous prime is 19530073. The next prime is 19530089. The reversal of 19530085 is 58003591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58003591 = 887 ⋅65393.

It can be written as a sum of positive squares in 2 ways, for example, as 1965604 + 17564481 = 1402^2 + 4191^2 .

It is a cyclic number.

It is not a de Polignac number, because 19530085 - 2¹⁷ = 19399013 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19530089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1953004 + ... + 1953013.

It is an arithmetic number, because the mean of its divisors is an integer number (5859027).

Almost surely, 2^19530085 is an apocalyptic number.

It is an amenable number.

19530085 is a deficient number, since it is larger than the sum of its proper divisors (3906023).

19530085 is an equidigital number, since it uses as much as digits as its factorization.

19530085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3906022.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 19530085 is about 4419.2855757464. The cubic root of 19530085 is about 269.2989816592.

The spelling of 19530085 in words is "nineteen million, five hundred thirty thousand, eighty-five".