20440027 has 4 divisors (see below), whose sum is σ = 20495200. Its totient is φ = 20384856.

The previous prime is 20439959. The next prime is 20440039. The reversal of 20440027 is 72004402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72004402 = 2 ⋅36002201.

It is a cyclic number.

It is not a de Polignac number, because 20440027 - 2¹¹ = 20437979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20439986 and 20440013.

It is not an unprimeable number, because it can be changed into a prime (20444027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27027 + ... + 27772.

It is an arithmetic number, because the mean of its divisors is an integer number (5123800).

Almost surely, 2^20440027 is an apocalyptic number.

20440027 is a deficient number, since it is larger than the sum of its proper divisors (55173).

20440027 is an equidigital number, since it uses as much as digits as its factorization.

20440027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55172.

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 20440027 is about 4521.0648082061. The cubic root of 20440027 is about 273.4180332721.

Adding to 20440027 its reverse (72004402), we get a palindrome (92444429).

The spelling of 20440027 in words is "twenty million, four hundred forty thousand, twenty-seven".