20384112 has 160 divisors (see below), whose sum is σ = 66027520. Its totient is φ = 5287680.

The previous prime is 20384101. The next prime is 20384113. The reversal of 20384112 is 21148302.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20384113) 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, 197853 + ... + 197955.

It is an arithmetic number, because the mean of its divisors is an integer number (412672).

Almost surely, 2^20384112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20384112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33013760).

20384112 is an abundant number, since it is smaller than the sum of its proper divisors (45643408).

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

20384112 is a wasteful number, since it uses less digits than its factorization.

20384112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 20384112 is about 4514.8767425036. The cubic root of 20384112 is about 273.1684880841.

The spelling of 20384112 in words is "twenty million, three hundred eighty-four thousand, one hundred twelve".