20024447 has 4 divisors (see below), whose sum is σ = 20112120. Its totient is φ = 19936776.

The previous prime is 20024339. The next prime is 20024483. The reversal of 20024447 is 74442002.

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 20024447 - 2²⁰ = 18975871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20024747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43493 + ... + 43950.

It is an arithmetic number, because the mean of its divisors is an integer number (5028030).

Almost surely, 2^20024447 is an apocalyptic number.

20024447 is a deficient number, since it is larger than the sum of its proper divisors (87673).

20024447 is an equidigital number, since it uses as much as digits as its factorization.

20024447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87672.

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 20024447 is about 4474.8683779526. The cubic root of 20024447 is about 271.5523155723.

Adding to 20024447 its reverse (74442002), we get a palindrome (94466449).

The spelling of 20024447 in words is "twenty million, twenty-four thousand, four hundred forty-seven".