20720848 has 20 divisors (see below), whose sum is σ = 41531940. Its totient is φ = 10002944.

The previous prime is 20720789. The next prime is 20720893. The reversal of 20720848 is 84802702.

It can be written as a sum of positive squares in 2 ways, for example, as 10810944 + 9909904 = 3288^2 + 3148^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 21865 + ... + 22792.

It is an arithmetic number, because the mean of its divisors is an integer number (2076597).

Almost surely, 2^20720848 is an apocalyptic number.

It is an amenable number.

20720848 is an abundant number, since it is smaller than the sum of its proper divisors (20811092).

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

20720848 is a wasteful number, since it uses less digits than its factorization.

20720848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44694 (or 44688 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 20720848 is about 4552.0158171957. The cubic root of 20720848 is about 274.6644855871.

The spelling of 20720848 in words is "twenty million, seven hundred twenty thousand, eight hundred forty-eight".