20085187 has 8 divisors (see below), whose sum is σ = 21056256. Its totient is φ = 19122312.

The previous prime is 20085173. The next prime is 20085199. The reversal of 20085187 is 78158002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20085187 - 2¹⁵ = 20052419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20085137) 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 7 ways as a sum of consecutive naturals, for example, 3298 + ... + 7144.

It is an arithmetic number, because the mean of its divisors is an integer number (2632032).

Almost surely, 2^20085187 is an apocalyptic number.

20085187 is a deficient number, since it is larger than the sum of its proper divisors (971069).

20085187 is a wasteful number, since it uses less digits than its factorization.

20085187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4097.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 20085187 is about 4481.6500309596. The cubic root of 20085187 is about 271.8266042716.

The spelling of 20085187 in words is "twenty million, eighty-five thousand, one hundred eighty-seven".