20382505 has 32 divisors (see below), whose sum is σ = 29756160. Its totient is φ = 13198080.

The previous prime is 20382503. The next prime is 20382529. The reversal of 20382505 is 50528302.

It is not a de Polignac number, because 20382505 - 2¹ = 20382503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20382505.

It is not an unprimeable number, because it can be changed into a prime (20382503) 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 31 ways as a sum of consecutive naturals, for example, 20244 + ... + 21226.

It is an arithmetic number, because the mean of its divisors is an integer number (929880).

Almost surely, 2^20382505 is an apocalyptic number.

It is an amenable number.

20382505 is a deficient number, since it is larger than the sum of its proper divisors (9373655).

20382505 is a wasteful number, since it uses less digits than its factorization.

20382505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 20382505 is about 4514.6987717898. The cubic root of 20382505 is about 273.1613094001.

The spelling of 20382505 in words is "twenty million, three hundred eighty-two thousand, five hundred five".