20886682 has 4 divisors (see below), whose sum is σ = 31330026. Its totient is φ = 10443340.

The previous prime is 20886661. The next prime is 20886683. The reversal of 20886682 is 28668802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28668802 = 2 ⋅14334401.

It can be written as a sum of positive squares in only one way, i.e., 11282881 + 9603801 = 3359^2 + 3099^2 .

It is not an unprimeable number, because it can be changed into a prime (20886683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5221669 + ... + 5221672.

Almost surely, 2^20886682 is an apocalyptic number.

20886682 is a deficient number, since it is larger than the sum of its proper divisors (10443344).

20886682 is a wasteful number, since it uses less digits than its factorization.

20886682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10443343.

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 20886682 is about 4570.1949630185. The cubic root of 20886682 is about 275.3952750998.

The spelling of 20886682 in words is "twenty million, eight hundred eighty-six thousand, six hundred eighty-two".