20332321081 has 2 divisors, whose sum is σ = 20332321082. Its totient is φ = 20332321080.

The previous prime is 20332321063. The next prime is 20332321099. The reversal of 20332321081 is 18012323302.

It is a balanced prime because it is at equal distance from previous prime (20332321063) and next prime (20332321099).

It can be written as a sum of positive squares in only one way, i.e., 19665855225 + 666465856 = 140235^2 + 25816^2 .

It is a cyclic number.

It is not a de Polignac number, because 20332321081 - 2²¹ = 20330223929 is a prime.

It is a super-2 number, since 2×20332321081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20332321481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10166160540 + 10166160541.

It is an arithmetic number, because the mean of its divisors is an integer number (10166160541).

Almost surely, 2^20332321081 is an apocalyptic number.

It is an amenable number.

20332321081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20332321081 is an equidigital number, since it uses as much as digits as its factorization.

20332321081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 20332321081 its reverse (18012323302), we get a palindrome (38344644383).

The spelling of 20332321081 in words is "twenty billion, three hundred thirty-two million, three hundred twenty-one thousand, eighty-one".