20249185 has 16 divisors (see below), whose sum is σ = 26609472. Its totient is φ = 14670400.

The previous prime is 20249183. The next prime is 20249189. The reversal of 20249185 is 58194202.

It is not a de Polignac number, because 20249185 - 2¹ = 20249183 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20249183) 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, 18555 + ... + 19615.

It is an arithmetic number, because the mean of its divisors is an integer number (1663092).

Almost surely, 2^20249185 is an apocalyptic number.

It is an amenable number.

20249185 is a deficient number, since it is larger than the sum of its proper divisors (6360287).

20249185 is a wasteful number, since it uses less digits than its factorization.

20249185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 20249185 is about 4499.9094435333. The cubic root of 20249185 is about 272.5644322010.

The spelling of 20249185 in words is "twenty million, two hundred forty-nine thousand, one hundred eighty-five".