20130552 has 128 divisors (see below), whose sum is σ = 61689600. Its totient is φ = 6044544.

The previous prime is 20130547. The next prime is 20130569. The reversal of 20130552 is 25503102.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 188083 + ... + 188189.

It is an arithmetic number, because the mean of its divisors is an integer number (481950).

Almost surely, 2^20130552 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 20130552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30844800).

20130552 is an abundant number, since it is smaller than the sum of its proper divisors (41559048).

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

20130552 is a wasteful number, since it uses less digits than its factorization.

20130552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 20130552 is about 4486.7083702866. The cubic root of 20130552 is about 272.0311022681.

Adding to 20130552 its reverse (25503102), we get a palindrome (45633654).

The spelling of 20130552 in words is "twenty million, one hundred thirty thousand, five hundred fifty-two".