20033240321 has 8 divisors (see below), whose sum is σ = 20156368104. Its totient is φ = 19910197120.

The previous prime is 20033240291. The next prime is 20033240323. The reversal of 20033240321 is 12304233002.

It can be written as a sum of positive squares in 4 ways, for example, as 3626448400 + 16406791921 = 60220^2 + 128089^2 .

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 20033240321 - 2⁶ = 20033240257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20033240293 and 20033240302.

It is not an unprimeable number, because it can be changed into a prime (20033240323) 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, 491981 + ... + 531141.

It is an arithmetic number, because the mean of its divisors is an integer number (2519546013).

Almost surely, 2^20033240321 is an apocalyptic number.

It is an amenable number.

20033240321 is a deficient number, since it is larger than the sum of its proper divisors (123127783).

20033240321 is a wasteful number, since it uses less digits than its factorization.

20033240321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42291.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 20033240321 its reverse (12304233002), we get a palindrome (32337473323).

The spelling of 20033240321 in words is "twenty billion, thirty-three million, two hundred forty thousand, three hundred twenty-one".