20324321 has 8 divisors (see below), whose sum is σ = 20549760. Its totient is φ = 20100528.

The previous prime is 20324267. The next prime is 20324323. The reversal of 20324321 is 12342302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20324321 is a prime.

It is a super-2 number, since 2×20324321² = 826156048222082, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20324321.

It is not an unprimeable number, because it can be changed into a prime (20324323) 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, 66050 + ... + 66356.

It is an arithmetic number, because the mean of its divisors is an integer number (2568720).

Almost surely, 2^20324321 is an apocalyptic number.

It is an amenable number.

20324321 is a deficient number, since it is larger than the sum of its proper divisors (225439).

20324321 is a wasteful number, since it uses less digits than its factorization.

20324321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 20324321 is about 4508.2503257916. The cubic root of 20324321 is about 272.9011391382.

Adding to 20324321 its reverse (12342302), we get a palindrome (32666623).

The spelling of 20324321 in words is "twenty million, three hundred twenty-four thousand, three hundred twenty-one".