20352120 has 64 divisors (see below), whose sum is σ = 63037440. Its totient is φ = 5251200.

The previous prime is 20352119. The next prime is 20352127. The reversal of 20352120 is 2125302.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20352120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20352127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 985 + ... + 6455.

It is an arithmetic number, because the mean of its divisors is an integer number (984960).

Almost surely, 2^20352120 is an apocalyptic number.

20352120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20352120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31518720).

20352120 is an abundant number, since it is smaller than the sum of its proper divisors (42685320).

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

20352120 is a wasteful number, since it uses less digits than its factorization.

20352120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5516 (or 5512 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20352120 is about 4511.3323974187. The cubic root of 20352120 is about 273.0255044669.

Adding to 20352120 its reverse (2125302), we get a palindrome (22477422).

The spelling of 20352120 in words is "twenty million, three hundred fifty-two thousand, one hundred twenty".