20384885 has 8 divisors (see below), whose sum is σ = 24797400. Its totient is φ = 16084224.

The previous prime is 20384879. The next prime is 20384899. The reversal of 20384885 is 58848302.

It can be written as a sum of positive squares in 4 ways, for example, as 5692996 + 14691889 = 2386^2 + 3833^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20384885 - 2¹⁰ = 20383861 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 27560 + ... + 28289.

It is an arithmetic number, because the mean of its divisors is an integer number (3099675).

Almost surely, 2^20384885 is an apocalyptic number.

It is an amenable number.

20384885 is a deficient number, since it is larger than the sum of its proper divisors (4412515).

20384885 is an equidigital number, since it uses as much as digits as its factorization.

20384885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55927.

The product of its (nonzero) digits is 61440, while the sum is 38.

The square root of 20384885 is about 4514.9623475728. The cubic root of 20384885 is about 273.1719410441.

The spelling of 20384885 in words is "twenty million, three hundred eighty-four thousand, eight hundred eighty-five".