20109530 has 16 divisors (see below), whose sum is σ = 41368320. Its totient is φ = 6894672.

The previous prime is 20109517. The next prime is 20109539. The reversal of 20109530 is 3590102.

It is not an unprimeable number, because it can be changed into a prime (20109539) 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, 143570 + ... + 143709.

It is an arithmetic number, because the mean of its divisors is an integer number (2585520).

Almost surely, 2^20109530 is an apocalyptic number.

20109530 is an abundant number, since it is smaller than the sum of its proper divisors (21258790).

20109530 is a wasteful number, since it uses less digits than its factorization.

20109530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287293.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 20109530 is about 4484.3650609646. The cubic root of 20109530 is about 271.9363767714.

Adding to 20109530 its reverse (3590102), we get a palindrome (23699632).

The spelling of 20109530 in words is "twenty million, one hundred nine thousand, five hundred thirty".