20630052 has 60 divisors (see below), whose sum is σ = 55281996. Its totient is φ = 6704640.

The previous prime is 20630041. The next prime is 20630059. The reversal of 20630052 is 25003602.

It can be written as a sum of positive squares in 2 ways, for example, as 1498176 + 19131876 = 1224^2 + 4374^2 .

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 (20630059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12508 + ... + 14060.

Almost surely, 2^20630052 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 20630052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27640998).

20630052 is an abundant number, since it is smaller than the sum of its proper divisors (34651944).

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

20630052 is a wasteful number, since it uses less digits than its factorization.

20630052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610 (or 1599 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20630052 is about 4542.0317039845. The cubic root of 20630052 is about 274.2627171009.

Adding to 20630052 its reverse (25003602), we get a palindrome (45633654).

The spelling of 20630052 in words is "twenty million, six hundred thirty thousand, fifty-two".