20024421 has 8 divisors (see below), whose sum is σ = 27860160. Its totient is φ = 12769152.

The previous prime is 20024339. The next prime is 20024483. The reversal of 20024421 is 12442002.

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

It is not a de Polignac number, because 20024421 - 2¹³ = 20016229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20024421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20024821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145036 + ... + 145173.

It is an arithmetic number, because the mean of its divisors is an integer number (3482520).

Almost surely, 2^20024421 is an apocalyptic number.

It is an amenable number.

20024421 is a deficient number, since it is larger than the sum of its proper divisors (7835739).

20024421 is a wasteful number, since it uses less digits than its factorization.

20024421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290235.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 20024421 is about 4474.8654728383. The cubic root of 20024421 is about 271.5521980433.

Adding to 20024421 its reverse (12442002), we get a palindrome (32466423).

The spelling of 20024421 in words is "twenty million, twenty-four thousand, four hundred twenty-one".