20333132321 has 4 divisors (see below), whose sum is σ = 21403297200. Its totient is φ = 19262967444.

The previous prime is 20333132293. The next prime is 20333132333. The reversal of 20333132321 is 12323133302.

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 a de Polignac number, because none of the positive numbers 2^k-20333132321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20333132021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535082411 + ... + 535082448.

It is an arithmetic number, because the mean of its divisors is an integer number (5350824300).

Almost surely, 2^20333132321 is an apocalyptic number.

It is an amenable number.

20333132321 is a deficient number, since it is larger than the sum of its proper divisors (1070164879).

20333132321 is a wasteful number, since it uses less digits than its factorization.

20333132321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070164878.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 20333132321 its reverse (12323133302), we get a palindrome (32656265623).

The spelling of 20333132321 in words is "twenty billion, three hundred thirty-three million, one hundred thirty-two thousand, three hundred twenty-one".