20243002321 has 4 divisors (see below), whose sum is σ = 20545136752. Its totient is φ = 19940867892.

The previous prime is 20243002289. The next prime is 20243002333. The reversal of 20243002321 is 12320034202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20243002321 - 2⁵ = 20243002289 is a prime.

It is a super-2 number, since 2×20243002321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20243002391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151067115 + ... + 151067248.

It is an arithmetic number, because the mean of its divisors is an integer number (5136284188).

Almost surely, 2^20243002321 is an apocalyptic number.

It is an amenable number.

20243002321 is a deficient number, since it is larger than the sum of its proper divisors (302134431).

20243002321 is an equidigital number, since it uses as much as digits as its factorization.

20243002321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302134430.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20243002321 its reverse (12320034202), we get a palindrome (32563036523).

The spelling of 20243002321 in words is "twenty billion, two hundred forty-three million, two thousand, three hundred twenty-one".