20043447 has 8 divisors (see below), whose sum is σ = 26749680. Its totient is φ = 13349760.

The previous prime is 20043433. The next prime is 20043451. The reversal of 20043447 is 74434002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20043447 - 2¹² = 20039351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20043407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1629 + ... + 6537.

It is an arithmetic number, because the mean of its divisors is an integer number (3343710).

Almost surely, 2^20043447 is an apocalyptic number.

20043447 is a deficient number, since it is larger than the sum of its proper divisors (6706233).

20043447 is a wasteful number, since it uses less digits than its factorization.

20043447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6273.

The product of its (nonzero) digits is 2688, while the sum is 24.

The square root of 20043447 is about 4476.9908420724. The cubic root of 20043447 is about 271.6381750055.

Adding to 20043447 its reverse (74434002), we get a palindrome (94477449).

The spelling of 20043447 in words is "twenty million, forty-three thousand, four hundred forty-seven".