20802884 has 12 divisors (see below), whose sum is σ = 37251984. Its totient is φ = 10159464.

The previous prime is 20802857. The next prime is 20802907. The reversal of 20802884 is 48820802.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20802884.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 60302 + ... + 60645.

It is an arithmetic number, because the mean of its divisors is an integer number (3104332).

Almost surely, 2^20802884 is an apocalyptic number.

It is an amenable number.

20802884 is a deficient number, since it is larger than the sum of its proper divisors (16449100).

20802884 is a wasteful number, since it uses less digits than its factorization.

20802884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120994 (or 120992 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 20802884 is about 4561.0178688534. The cubic root of 20802884 is about 275.0264833999.

The spelling of 20802884 in words is "twenty million, eight hundred two thousand, eight hundred eighty-four".