20802082850 has 12 divisors (see below), whose sum is σ = 38691874194. Its totient is φ = 8320833120.

The previous prime is 20802082849. The next prime is 20802082853. The reversal of 20802082850 is 5828020802.

It can be written as a sum of positive squares in 3 ways, for example, as 11048742769 + 9753340081 = 105113^2 + 98759^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20802082850.

It is not an unprimeable number, because it can be changed into a prime (20802082853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 208020779 + ... + 208020878.

Almost surely, 2^20802082850 is an apocalyptic number.

20802082850 is a deficient number, since it is larger than the sum of its proper divisors (17889791344).

20802082850 is a wasteful number, since it uses less digits than its factorization.

20802082850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416041669 (or 416041664 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 35.

The spelling of 20802082850 in words is "twenty billion, eight hundred two million, eighty-two thousand, eight hundred fifty".