20635232 has 48 divisors (see below), whose sum is σ = 43273440. Its totient is φ = 9682816.

The previous prime is 20635231. The next prime is 20635261. The reversal of 20635232 is 23253602.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 20635198 and 20635207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20635231) 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, 389318 + ... + 389370.

It is an arithmetic number, because the mean of its divisors is an integer number (901530).

Almost surely, 2^20635232 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 20635232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21636720).

20635232 is an abundant number, since it is smaller than the sum of its proper divisors (22638208).

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

20635232 is an frugal number, since it uses more digits than its factorization.

20635232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 20635232 is about 4542.6018975913. The cubic root of 20635232 is about 274.2856700562.

Adding to 20635232 its reverse (23253602), we get a palindrome (43888834).

The spelling of 20635232 in words is "twenty million, six hundred thirty-five thousand, two hundred thirty-two".