20116530 has 96 divisors (see below), whose sum is σ = 61461504. Its totient is φ = 4468608.

The previous prime is 20116487. The next prime is 20116531. The reversal of 20116530 is 3561102.

20116530 is a `hidden beast` number, since 2 + 0 + 11 + 653 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20116531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22879 + ... + 23741.

It is an arithmetic number, because the mean of its divisors is an integer number (640224).

Almost surely, 2^20116530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20116530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30730752).

20116530 is an abundant number, since it is smaller than the sum of its proper divisors (41344974).

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

20116530 is a wasteful number, since it uses less digits than its factorization.

20116530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920 (or 917 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 20116530 is about 4485.1454825903. The cubic root of 20116530 is about 271.9679262209.

Adding to 20116530 its reverse (3561102), we get a palindrome (23677632).

The spelling of 20116530 in words is "twenty million, one hundred sixteen thousand, five hundred thirty".