20024439 has 4 divisors (see below), whose sum is σ = 26699256. Its totient is φ = 13349624.

The previous prime is 20024339. The next prime is 20024483. The reversal of 20024439 is 93442002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20024439 - 2⁷ = 20024311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20024339) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3337404 + ... + 3337409.

It is an arithmetic number, because the mean of its divisors is an integer number (6674814).

Almost surely, 2^20024439 is an apocalyptic number.

20024439 is a deficient number, since it is larger than the sum of its proper divisors (6674817).

20024439 is an equidigital number, since it uses as much as digits as its factorization.

20024439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6674816.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20024439 is about 4474.8674840715. The cubic root of 20024439 is about 271.5522794095.

It can be divided in two parts, 2002 and 4439, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 20024439 in words is "twenty million, twenty-four thousand, four hundred thirty-nine".