20530176 has 88 divisors (see below), whose sum is σ = 56398944. Its totient is φ = 6635520.

The previous prime is 20530163. The next prime is 20530177. The reversal of 20530176 is 67103502.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (20530177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125871 + ... + 126033.

Almost surely, 2^20530176 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20530176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28199472).

20530176 is an abundant number, since it is smaller than the sum of its proper divisors (35868768).

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

20530176 is a wasteful number, since it uses less digits than its factorization.

20530176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 20530176 is about 4531.0237253848. The cubic root of 20530176 is about 273.8194060998.

Adding to 20530176 its reverse (67103502), we get a palindrome (87633678).

It can be divided in two parts, 20530 and 176, that added together give a triangular number (20706 = T₂₀₃).

The spelling of 20530176 in words is "twenty million, five hundred thirty thousand, one hundred seventy-six".