20001100109923 has 2 divisors, whose sum is σ = 20001100109924. Its totient is φ = 20001100109922.

The previous prime is 20001100109897. The next prime is 20001100110007. The reversal of 20001100109923 is 32990100110002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20001100109923 - 2⁵ = 20001100109891 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20001100109891 and 20001100109900.

It is not a weakly prime, because it can be changed into another prime (20001100149923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000550054961 + 10000550054962.

It is an arithmetic number, because the mean of its divisors is an integer number (10000550054962).

Almost surely, 2^{20001100109923} is an apocalyptic number.

20001100109923 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001100109923 is an equidigital number, since it uses as much as digits as its factorization.

20001100109923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 28.

Adding to 20001100109923 its reverse (32990100110002), we get a palindrome (52991200219925).

The spelling of 20001100109923 in words is "twenty trillion, one billion, one hundred million, one hundred nine thousand, nine hundred twenty-three".