20720752 has 60 divisors (see below), whose sum is σ = 44476320. Its totient is φ = 9345024.

The previous prime is 20720743. The next prime is 20720753. The reversal of 20720752 is 25702702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20720753) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 213568 + ... + 213664.

It is an arithmetic number, because the mean of its divisors is an integer number (741272).

Almost surely, 2^20720752 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20720752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22238160).

20720752 is an abundant number, since it is smaller than the sum of its proper divisors (23755568).

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

20720752 is a wasteful number, since it uses less digits than its factorization.

20720752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 25.

The square root of 20720752 is about 4552.0052724047. The cubic root of 20720752 is about 274.6640614116.

The spelling of 20720752 in words is "twenty million, seven hundred twenty thousand, seven hundred fifty-two".