20682205 has 16 divisors (see below), whose sum is σ = 25320240. Its totient is φ = 16215552.

The previous prime is 20682199. The next prime is 20682247. The reversal of 20682205 is 50228602.

It can be written as a sum of positive squares in 8 ways, for example, as 224676 + 20457529 = 474^2 + 4523^2 .

It is a cyclic number.

It is not a de Polignac number, because 20682205 - 2⁵ = 20682173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20682205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74527 + ... + 74803.

It is an arithmetic number, because the mean of its divisors is an integer number (1582515).

Almost surely, 2^20682205 is an apocalyptic number.

It is an amenable number.

20682205 is a deficient number, since it is larger than the sum of its proper divisors (4638035).

20682205 is a wasteful number, since it uses less digits than its factorization.

20682205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20682205 is about 4547.7692333715. The cubic root of 20682205 is about 274.4936356842.

The spelling of 20682205 in words is "twenty million, six hundred eighty-two thousand, two hundred five".