20912752 has 40 divisors (see below), whose sum is σ = 47081312. Its totient is φ = 8812800.

The previous prime is 20912743. The next prime is 20912753. The reversal of 20912752 is 25721902.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 20912752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20912753) 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 7 ways as a sum of consecutive naturals, for example, 5302 + ... + 8362.

Almost surely, 2^20912752 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 20912752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23540656).

20912752 is an abundant number, since it is smaller than the sum of its proper divisors (26168560).

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

20912752 is a wasteful number, since it uses less digits than its factorization.

20912752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3137 (or 3131 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 20912752 is about 4573.0462494928. The cubic root of 20912752 is about 275.5098069308.

The spelling of 20912752 in words is "twenty million, nine hundred twelve thousand, seven hundred fifty-two".