20321330110387 has 2 divisors, whose sum is σ = 20321330110388. Its totient is φ = 20321330110386.

The previous prime is 20321330110303. The next prime is 20321330110397. The reversal of 20321330110387 is 78301103312302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20321330110387 is a prime.

It is a super-3 number, since 3×20321330110387³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20321330110397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160665055193 + 10160665055194.

It is an arithmetic number, because the mean of its divisors is an integer number (10160665055194).

Almost surely, 2^{20321330110387} is an apocalyptic number.

20321330110387 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321330110387 is an equidigital number, since it uses as much as digits as its factorization.

20321330110387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

Adding to 20321330110387 its reverse (78301103312302), we get a palindrome (98622433422689).

The spelling of 20321330110387 in words is "twenty trillion, three hundred twenty-one billion, three hundred thirty million, one hundred ten thousand, three hundred eighty-seven".