20936448 has 144 divisors (see below), whose sum is σ = 66961440. Its totient is φ = 6414336.

The previous prime is 20936441. The next prime is 20936453. The reversal of 20936448 is 84463902.

It is a happy number.

20936448 is a `hidden beast` number, since 2 + 0 + 9 + 3 + 644 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20936441) 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 15 ways as a sum of consecutive naturals, for example, 89740 + ... + 89972.

It is an arithmetic number, because the mean of its divisors is an integer number (465010).

Almost surely, 2^20936448 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 20936448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33480720).

20936448 is an abundant number, since it is smaller than the sum of its proper divisors (46024992).

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

20936448 is a wasteful number, since it uses less digits than its factorization.

20936448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 20936448 is about 4575.6363491869. The cubic root of 20936448 is about 275.6138266561.

The spelling of 20936448 in words is "twenty million, nine hundred thirty-six thousand, four hundred forty-eight".