20840682 has 16 divisors (see below), whose sum is σ = 43875360. Its totient is φ = 6581232.

The previous prime is 20840653. The next prime is 20840683. The reversal of 20840682 is 28604802.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20840683) 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 in 7 ways as a sum of consecutive naturals, for example, 91293 + ... + 91520.

It is an arithmetic number, because the mean of its divisors is an integer number (2742210).

Almost surely, 2^20840682 is an apocalyptic number.

20840682 is an abundant number, since it is smaller than the sum of its proper divisors (23034678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20840682 is a wasteful number, since it uses less digits than its factorization.

20840682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182837.

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 20840682 is about 4565.1595810004. The cubic root of 20840682 is about 275.1929532882.

The spelling of 20840682 in words is "twenty million, eight hundred forty thousand, six hundred eighty-two".