20024221 has 8 divisors (see below), whose sum is σ = 22929984. Its totient is φ = 17129760.

The previous prime is 20024219. The next prime is 20024299. The reversal of 20024221 is 12242002.

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

It is a cyclic number.

It is not a de Polignac number, because 20024221 - 2¹ = 20024219 is a prime.

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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1401 + ... + 6481.

It is an arithmetic number, because the mean of its divisors is an integer number (2866248).

Almost surely, 2^20024221 is an apocalyptic number.

It is an amenable number.

20024221 is a deficient number, since it is larger than the sum of its proper divisors (2905763).

20024221 is an equidigital number, since it uses as much as digits as its factorization.

20024221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5651.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 20024221 is about 4474.8431257420. The cubic root of 20024221 is about 271.5512939702.

Adding to 20024221 its reverse (12242002), we get a palindrome (32266223).

The spelling of 20024221 in words is "twenty million, twenty-four thousand, two hundred twenty-one".