20000187 has 6 divisors (see below), whose sum is σ = 28889172. Its totient is φ = 13333452.

The previous prime is 20000171. The next prime is 20000213. The reversal of 20000187 is 78100002.

It is not a de Polignac number, because 20000187 - 2⁴ = 20000171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20000107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1111113 + ... + 1111130.

It is an arithmetic number, because the mean of its divisors is an integer number (4814862).

Almost surely, 2^20000187 is an apocalyptic number.

20000187 is a deficient number, since it is larger than the sum of its proper divisors (8888985).

20000187 is a wasteful number, since it uses less digits than its factorization.

20000187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2222249 (or 2222246 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 20000187 is about 4472.1568621863. The cubic root of 20000187 is about 271.4426076503.

Adding to 20000187 its reverse (78100002), we get a palindrome (98100189).

The spelling of 20000187 in words is "twenty million, one hundred eighty-seven", and thus it is an aban number.