20324047 has 4 divisors (see below), whose sum is σ = 20460600. Its totient is φ = 20187496.

The previous prime is 20324039. The next prime is 20324077. The reversal of 20324047 is 74042302.

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 20324047 - 2³ = 20324039 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 (20324077) 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, 68053 + ... + 68350.

It is an arithmetic number, because the mean of its divisors is an integer number (5115150).

Almost surely, 2^20324047 is an apocalyptic number.

20324047 is a deficient number, since it is larger than the sum of its proper divisors (136553).

20324047 is a wasteful number, since it uses less digits than its factorization.

20324047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136552.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 20324047 is about 4508.2199369596. The cubic root of 20324047 is about 272.8999127709.

Adding to 20324047 its reverse (74042302), we get a palindrome (94366349).

The spelling of 20324047 in words is "twenty million, three hundred twenty-four thousand, forty-seven".