20162187 has 12 divisors (see below), whose sum is σ = 30836520. Its totient is φ = 12650688.

The previous prime is 20162171. The next prime is 20162213. The reversal of 20162187 is 78126102.

It is not a de Polignac number, because 20162187 - 2⁴ = 20162171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20162187.

It is not an unprimeable number, because it can be changed into a prime (20162167) 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 11 ways as a sum of consecutive naturals, for example, 65737 + ... + 66042.

It is an arithmetic number, because the mean of its divisors is an integer number (2569710).

Almost surely, 2^20162187 is an apocalyptic number.

20162187 is a deficient number, since it is larger than the sum of its proper divisors (10674333).

20162187 is a wasteful number, since it uses less digits than its factorization.

20162187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131802 (or 131799 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 20162187 is about 4490.2323993308. The cubic root of 20162187 is about 272.1735259155.

Adding to 20162187 its reverse (78126102), we get a palindrome (98288289).

The spelling of 20162187 in words is "twenty million, one hundred sixty-two thousand, one hundred eighty-seven".