20024047 has 4 divisors (see below), whose sum is σ = 20670016. Its totient is φ = 19378080.

The previous prime is 20024009. The next prime is 20024077. The reversal of 20024047 is 74042002.

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 20024047 - 2¹¹ = 20021999 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 (20024077) 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, 322938 + ... + 322999.

It is an arithmetic number, because the mean of its divisors is an integer number (5167504).

Almost surely, 2^20024047 is an apocalyptic number.

20024047 is a deficient number, since it is larger than the sum of its proper divisors (645969).

20024047 is an equidigital number, since it uses as much as digits as its factorization.

20024047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645968.

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

The square root of 20024047 is about 4474.8236836774. The cubic root of 20024047 is about 271.5505074217.

Adding to 20024047 its reverse (74042002), we get a palindrome (94066049).

The spelling of 20024047 in words is "twenty million, twenty-four thousand, forty-seven".