20163836 has 48 divisors (see below), whose sum is σ = 46593792. Its totient is φ = 7392000.

The previous prime is 20163821. The next prime is 20163839. The reversal of 20163836 is 63836102.

It is a junction number, because it is equal to n+sod(n) for n = 20163799 and 20163808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20163839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3311 + ... + 7161.

It is an arithmetic number, because the mean of its divisors is an integer number (970704).

Almost surely, 2^20163836 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 20163836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23296896).

20163836 is an abundant number, since it is smaller than the sum of its proper divisors (26429956).

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

20163836 is a wasteful number, since it uses less digits than its factorization.

20163836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3890 (or 3888 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20163836 is about 4490.4160163620. The cubic root of 20163836 is about 272.1809457771.

Adding to 20163836 its reverse (63836102), we get a palindrome (83999938).

The spelling of 20163836 in words is "twenty million, one hundred sixty-three thousand, eight hundred thirty-six".