20802708 has 36 divisors (see below), whose sum is σ = 53452308. Its totient is φ = 6819840.

The previous prime is 20802697. The next prime is 20802709. The reversal of 20802708 is 80720802.

It can be written as a sum of positive squares in 2 ways, for example, as 10575504 + 10227204 = 3252^2 + 3198^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20802709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2541 + ... + 6932.

Almost surely, 2^20802708 is an apocalyptic number.

It is an amenable number.

20802708 is an abundant number, since it is smaller than the sum of its proper divisors (32649600).

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

20802708 is a wasteful number, since it uses less digits than its factorization.

20802708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9544 (or 9539 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 20802708 is about 4560.9985748737. The cubic root of 20802708 is about 275.0257077895.

The spelling of 20802708 in words is "twenty million, eight hundred two thousand, seven hundred eight".