20382520 has 16 divisors (see below), whose sum is σ = 45860760. Its totient is φ = 8152992.

The previous prime is 20382503. The next prime is 20382529. The reversal of 20382520 is 2528302.

It is a junction number, because it is equal to n+sod(n) for n = 20382491 and 20382500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20382529) 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 3 ways as a sum of consecutive naturals, for example, 254742 + ... + 254821.

Almost surely, 2^20382520 is an apocalyptic number.

20382520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20382520 is an abundant number, since it is smaller than the sum of its proper divisors (25478240).

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

20382520 is a wasteful number, since it uses less digits than its factorization.

20382520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509574 (or 509570 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20382520 is about 4514.7004330299. The cubic root of 20382520 is about 273.1613764088.

It can be divided in two parts, 20382 and 520, that added together give a palindrome (20902).

The spelling of 20382520 in words is "twenty million, three hundred eighty-two thousand, five hundred twenty".