20802648 has 16 divisors (see below), whose sum is σ = 52006680. Its totient is φ = 6934208.

The previous prime is 20802641. The next prime is 20802697. The reversal of 20802648 is 84620802.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20802641) 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 3 ways as a sum of consecutive naturals, for example, 433365 + ... + 433412.

Almost surely, 2^20802648 is an apocalyptic number.

It is an amenable number.

20802648 is an abundant number, since it is smaller than the sum of its proper divisors (31204032).

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

20802648 is a wasteful number, since it uses less digits than its factorization.

20802648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866786 (or 866782 counting only the distinct ones).

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

The square root of 20802648 is about 4560.9919973620. The cubic root of 20802648 is about 275.0254433759.

The spelling of 20802648 in words is "twenty million, eight hundred two thousand, six hundred forty-eight".