20018352 has 80 divisors (see below), whose sum is σ = 54505440. Its totient is φ = 6322176.

The previous prime is 20018351. The next prime is 20018357. The reversal of 20018352 is 25381002.

It is not an unprimeable number, because it can be changed into a prime (20018351) 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 15 ways as a sum of consecutive naturals, for example, 101518 + ... + 101714.

It is an arithmetic number, because the mean of its divisors is an integer number (681318).

Almost surely, 2^20018352 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 20018352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27252720).

20018352 is an abundant number, since it is smaller than the sum of its proper divisors (34487088).

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

20018352 is a wasteful number, since it uses less digits than its factorization.

20018352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20018352 is about 4474.1873005050. The cubic root of 20018352 is about 271.5247612647.

Adding to 20018352 its reverse (25381002), we get a palindrome (45399354).

The spelling of 20018352 in words is "twenty million, eighteen thousand, three hundred fifty-two".