20380000 has 60 divisors (see below), whose sum is σ = 50187060. Its totient is φ = 8144000.

The previous prime is 20379977. The next prime is 20380033. The reversal of 20380000 is 8302.

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 9 ways as a sum of consecutive naturals, for example, 19491 + ... + 20509.

It is an arithmetic number, because the mean of its divisors is an integer number (836451).

Almost surely, 2^20380000 is an apocalyptic number.

20380000 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 20380000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25093530).

20380000 is an abundant number, since it is smaller than the sum of its proper divisors (29807060).

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

20380000 is an equidigital number, since it uses as much as digits as its factorization.

20380000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049 (or 1026 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20380000 is about 4514.4213361183. The cubic root of 20380000 is about 273.1501184774.

Adding to 20380000 its reverse (8302), we get a palindrome (20388302).

The spelling of 20380000 in words is "twenty million, three hundred eighty thousand".