20110530 has 64 divisors (see below), whose sum is σ = 53136000. Its totient is φ = 4830720.

The previous prime is 20110523. The next prime is 20110547. The reversal of 20110530 is 3501102.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48966 + ... + 49374.

It is an arithmetic number, because the mean of its divisors is an integer number (830250).

Almost surely, 2^20110530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20110530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26568000).

20110530 is an abundant number, since it is smaller than the sum of its proper divisors (33025470).

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

20110530 is a wasteful number, since it uses less digits than its factorization.

20110530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 20110530 is about 4484.4765580835. The cubic root of 20110530 is about 271.9408842838.

Adding to 20110530 its reverse (3501102), we get a palindrome (23611632).

It can be divided in two parts, 201 and 10530, that added together give a triangular number (10731 = T₁₄₆).

The spelling of 20110530 in words is "twenty million, one hundred ten thousand, five hundred thirty".