20109232 has 120 divisors (see below), whose sum is σ = 49871808. Its totient is φ = 7772160.

The previous prime is 20109227. The next prime is 20109233. The reversal of 20109232 is 23290102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20109233) 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 23 ways as a sum of consecutive naturals, for example, 427833 + ... + 427879.

Almost surely, 2^20109232 is an apocalyptic number.

20109232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20109232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24935904).

20109232 is an abundant number, since it is smaller than the sum of its proper divisors (29762576).

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

20109232 is a wasteful number, since it uses less digits than its factorization.

20109232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 20109232 is about 4484.3318342870. The cubic root of 20109232 is about 271.9350335038.

Adding to 20109232 its reverse (23290102), we get a palindrome (43399334).

The spelling of 20109232 in words is "twenty million, one hundred nine thousand, two hundred thirty-two".