20704032 has 96 divisors (see below), whose sum is σ = 62415360. Its totient is φ = 6670080.

The previous prime is 20704007. The next prime is 20704037. The reversal of 20704032 is 23040702.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20703996 and 20704014.

It is not an unprimeable number, because it can be changed into a prime (20704037) 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, 26398 + ... + 27170.

It is an arithmetic number, because the mean of its divisors is an integer number (650160).

Almost surely, 2^20704032 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 20704032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31207680).

20704032 is an abundant number, since it is smaller than the sum of its proper divisors (41711328).

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

20704032 is a wasteful number, since it uses less digits than its factorization.

20704032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823 (or 809 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 20704032 is about 4550.1683485339. The cubic root of 20704032 is about 274.5901641758.

Adding to 20704032 its reverse (23040702), we get a palindrome (43744734).

The spelling of 20704032 in words is "twenty million, seven hundred four thousand, thirty-two".