20331322331233 has 2 divisors, whose sum is σ = 20331322331234. Its totient is φ = 20331322331232.

The previous prime is 20331322331231. The next prime is 20331322331249. The reversal of 20331322331233 is 33213322313302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16312648587664 + 4018673743569 = 4038892^2 + 2004663^2 .

It is a cyclic number.

It is not a de Polignac number, because 20331322331233 - 2¹ = 20331322331231 is a prime.

Together with 20331322331231, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20331322331195 and 20331322331204.

It is not a weakly prime, because it can be changed into another prime (20331322331231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165661165616 + 10165661165617.

It is an arithmetic number, because the mean of its divisors is an integer number (10165661165617).

Almost surely, 2^{20331322331233} is an apocalyptic number.

It is an amenable number.

20331322331233 is a deficient number, since it is larger than the sum of its proper divisors (1).

20331322331233 is an equidigital number, since it uses as much as digits as its factorization.

20331322331233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 31.

Adding to 20331322331233 its reverse (33213322313302), we get a palindrome (53544644644535).

The spelling of 20331322331233 in words is "twenty trillion, three hundred thirty-one billion, three hundred twenty-two million, three hundred thirty-one thousand, two hundred thirty-three".