20163384 has 64 divisors (see below), whose sum is σ = 56378400. Its totient is φ = 6676992.

The previous prime is 20163359. The next prime is 20163397. The reversal of 20163384 is 48336102.

It is a happy number.

20163384 is a `hidden beast` number, since 20 + 1 + 633 + 8 + 4 = 666.

It is a super-4 number, since 4×20163384⁴ (a number of 30 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 15 ways as a sum of consecutive naturals, for example, 59664 + ... + 60000.

Almost surely, 2^20163384 is an apocalyptic number.

20163384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20163384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28189200).

20163384 is an abundant number, since it is smaller than the sum of its proper divisors (36215016).

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

20163384 is a wasteful number, since it uses less digits than its factorization.

20163384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 20163384 is about 4490.3656866674. The cubic root of 20163384 is about 272.1789119923.

Adding to 20163384 its reverse (48336102), we get a palindrome (68499486).

The spelling of 20163384 in words is "twenty million, one hundred sixty-three thousand, three hundred eighty-four".