20680996 has 24 divisors (see below), whose sum is σ = 41461056. Its totient is φ = 8842080.

The previous prime is 20680981. The next prime is 20680997. The reversal of 20680996 is 69908602.

It is a happy number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20680997) 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, 18411 + ... + 19501.

It is an arithmetic number, because the mean of its divisors is an integer number (1727544).

Almost surely, 2^20680996 is an apocalyptic number.

It is an amenable number.

20680996 is an abundant number, since it is smaller than the sum of its proper divisors (20780060).

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

20680996 is a wasteful number, since it uses less digits than its factorization.

20680996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1779 (or 1777 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 20680996 is about 4547.6363091171. The cubic root of 20680996 is about 274.4882869755.

The spelling of 20680996 in words is "twenty million, six hundred eighty thousand, nine hundred ninety-six".