20380304 has 20 divisors (see below), whose sum is σ = 45128064. Its totient is φ = 8734368.

The previous prime is 20380291. The next prime is 20380307. The reversal of 20380304 is 40308302.

It is a super-2 number, since 2×20380304² = 830713582264832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20380307) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 90872 + ... + 91095.

Almost surely, 2^20380304 is an apocalyptic number.

It is an amenable number.

20380304 is an abundant number, since it is smaller than the sum of its proper divisors (24747760).

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

20380304 is a wasteful number, since it uses less digits than its factorization.

20380304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181982 (or 181976 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20380304 is about 4514.4550058673. The cubic root of 20380304 is about 273.1514766262.

Adding to 20380304 its reverse (40308302), we get a palindrome (60688606).

The spelling of 20380304 in words is "twenty million, three hundred eighty thousand, three hundred four".