20130530 has 16 divisors (see below), whose sum is σ = 41411520. Its totient is φ = 6901872.

The previous prime is 20130529. The next prime is 20130541. The reversal of 20130530 is 3503102.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143720 + ... + 143859.

It is an arithmetic number, because the mean of its divisors is an integer number (2588220).

Almost surely, 2^20130530 is an apocalyptic number.

20130530 is an abundant number, since it is smaller than the sum of its proper divisors (21280990).

20130530 is a wasteful number, since it uses less digits than its factorization.

20130530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287593.

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 20130530 is about 4486.7059186000. The cubic root of 20130530 is about 272.0310031702.

Adding to 20130530 its reverse (3503102), we get a palindrome (23633632).

The spelling of 20130530 in words is "twenty million, one hundred thirty thousand, five hundred thirty".