19008085 has 4 divisors (see below), whose sum is σ = 22809708. Its totient is φ = 15206464.

The previous prime is 19008071. The next prime is 19008103. The reversal of 19008085 is 58080091.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4704561 + 14303524 = 2169^2 + 3782^2 .

It is a cyclic number.

It is not a de Polignac number, because 19008085 - 2¹¹ = 19006037 is a prime.

It is a super-2 number, since 2×19008085² = 722614590734450, which contains 22 as substring.

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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1900804 + ... + 1900813.

It is an arithmetic number, because the mean of its divisors is an integer number (5702427).

Almost surely, 2^19008085 is an apocalyptic number.

It is an amenable number.

19008085 is a deficient number, since it is larger than the sum of its proper divisors (3801623).

19008085 is an equidigital number, since it uses as much as digits as its factorization.

19008085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3801622.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 19008085 is about 4359.8262580062. The cubic root of 19008085 is about 266.8780086756.

The spelling of 19008085 in words is "nineteen million, eight thousand, eighty-five".