20321231100047 has 2 divisors, whose sum is σ = 20321231100048. Its totient is φ = 20321231100046.

The previous prime is 20321231099951. The next prime is 20321231100109. The reversal of 20321231100047 is 74000113212302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20321231100047 - 2⁸ = 20321231099791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20321231099989 and 20321231100025.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20321231300047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160615550023 + 10160615550024.

It is an arithmetic number, because the mean of its divisors is an integer number (10160615550024).

Almost surely, 2^{20321231100047} is an apocalyptic number.

20321231100047 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321231100047 is an equidigital number, since it uses as much as digits as its factorization.

20321231100047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

Adding to 20321231100047 its reverse (74000113212302), we get a palindrome (94321344312349).

The spelling of 20321231100047 in words is "twenty trillion, three hundred twenty-one billion, two hundred thirty-one million, one hundred thousand, forty-seven".