19860849 has 16 divisors (see below), whose sum is σ = 29980800. Its totient is φ = 12989808.

The previous prime is 19860803. The next prime is 19860881. The reversal of 19860849 is 94806891.

It is not a de Polignac number, because 19860849 - 2⁷ = 19860721 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19860889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5509 + ... + 8370.

It is an arithmetic number, because the mean of its divisors is an integer number (1873800).

Almost surely, 2^19860849 is an apocalyptic number.

It is an amenable number.

19860849 is a deficient number, since it is larger than the sum of its proper divisors (10119951).

19860849 is a wasteful number, since it uses less digits than its factorization.

19860849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13941 (or 13935 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 19860849 is about 4456.5512450773. The cubic root of 19860849 is about 270.8107728006.

The spelling of 19860849 in words is "nineteen million, eight hundred sixty thousand, eight hundred forty-nine".