20385184 has 24 divisors (see below), whose sum is σ = 40430880. Its totient is φ = 10117056.

The previous prime is 20385181. The next prime is 20385203. The reversal of 20385184 is 48158302.

It is not an unprimeable number, because it can be changed into a prime (20385181) 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, 2157 + ... + 6739.

It is an arithmetic number, because the mean of its divisors is an integer number (1684620).

Almost surely, 2^20385184 is an apocalyptic number.

It is an amenable number.

20385184 is a deficient number, since it is larger than the sum of its proper divisors (20045696).

20385184 is a wasteful number, since it uses less digits than its factorization.

20385184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4732 (or 4724 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 20385184 is about 4514.9954595769. The cubic root of 20385184 is about 273.1732766417.

The spelling of 20385184 in words is "twenty million, three hundred eighty-five thousand, one hundred eighty-four".