20027844 has 48 divisors (see below), whose sum is σ = 53202240. Its totient is φ = 6511680.

The previous prime is 20027801. The next prime is 20027851. The reversal of 20027844 is 44872002.

It is a super-2 number, since 2×20027844² = 802229070576672, which contains 22 as substring.

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

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2167 + ... + 6689.

It is an arithmetic number, because the mean of its divisors is an integer number (1108380).

Almost surely, 2^20027844 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 20027844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26601120).

20027844 is an abundant number, since it is smaller than the sum of its proper divisors (33174396).

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

20027844 is a wasteful number, since it uses less digits than its factorization.

20027844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4577 (or 4569 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 20027844 is about 4475.2479260930. The cubic root of 20027844 is about 271.5676703211.

Adding to 20027844 its reverse (44872002), we get a palindrome (64899846).

The spelling of 20027844 in words is "twenty million, twenty-seven thousand, eight hundred forty-four".