20321221333 has 8 divisors (see below), whose sum is σ = 23449731968. Its totient is φ = 17249080464.

The previous prime is 20321221331. The next prime is 20321221351. The reversal of 20321221333 is 33312212302.

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

It is not a de Polignac number, because 20321221333 - 2¹ = 20321221331 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321221331) 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, 14091666 + ... + 14093107.

It is an arithmetic number, because the mean of its divisors is an integer number (2931216496).

Almost surely, 2^20321221333 is an apocalyptic number.

It is an amenable number.

20321221333 is a deficient number, since it is larger than the sum of its proper divisors (3128510635).

20321221333 is a wasteful number, since it uses less digits than its factorization.

20321221333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28184883.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 20321221333 its reverse (33312212302), we get a palindrome (53633433635).

The spelling of 20321221333 in words is "twenty billion, three hundred twenty-one million, two hundred twenty-one thousand, three hundred thirty-three".