20002186 has 4 divisors (see below), whose sum is σ = 30003282. Its totient is φ = 10001092.

The previous prime is 20002159. The next prime is 20002187. The reversal of 20002186 is 68120002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68120002 = 2 ⋅34060001.

It can be written as a sum of positive squares in only one way, i.e., 18361225 + 1640961 = 4285^2 + 1281^2 .

It is not an unprimeable number, because it can be changed into a prime (20002187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000545 + ... + 5000548.

Almost surely, 2^20002186 is an apocalyptic number.

20002186 is a deficient number, since it is larger than the sum of its proper divisors (10001096).

20002186 is a wasteful number, since it uses less digits than its factorization.

20002186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10001095.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 20002186 is about 4472.3803505516. The cubic root of 20002186 is about 271.4516508274.

Adding to 20002186 its reverse (68120002), we get a palindrome (88122188).

It can be divided in two parts, 2000 and 2186, that added together give a triangular number (4186 = T₉₁).

The spelling of 20002186 in words is "twenty million, two thousand, one hundred eighty-six".