19886085 has 12 divisors (see below), whose sum is σ = 34469292. Its totient is φ = 10605888.

The previous prime is 19886063. The next prime is 19886093. The reversal of 19886085 is 58068891.

It can be written as a sum of positive squares in 2 ways, for example, as 6687396 + 13198689 = 2586^2 + 3633^2 .

It is not a de Polignac number, because 19886085 - 2¹¹ = 19884037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 441913 = 19886085 / (1 + 9 + 8 + 8 + 6 + 0 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 19886085.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 220912 + ... + 221001.

It is an arithmetic number, because the mean of its divisors is an integer number (2872441).

Almost surely, 2^19886085 is an apocalyptic number.

19886085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19886085 is a deficient number, since it is larger than the sum of its proper divisors (14583207).

19886085 is a wasteful number, since it uses less digits than its factorization.

19886085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441924 (or 441921 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 19886085 is about 4459.3816835970. The cubic root of 19886085 is about 270.9254253029.

The spelling of 19886085 in words is "nineteen million, eight hundred eighty-six thousand, eighty-five".