20001101993 has 2 divisors, whose sum is σ = 20001101994. Its totient is φ = 20001101992.

The previous prime is 20001101971. The next prime is 20001102031. The reversal of 20001101993 is 39910110002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18744895744 + 1256206249 = 136912^2 + 35443^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001101993 - 2¹⁶ = 20001036457 is a prime.

It is not a weakly prime, because it can be changed into another prime (20001100993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000550996 + 10000550997.

It is an arithmetic number, because the mean of its divisors is an integer number (10000550997).

Almost surely, 2^20001101993 is an apocalyptic number.

It is an amenable number.

20001101993 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001101993 is an equidigital number, since it uses as much as digits as its factorization.

20001101993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 26.

Adding to 20001101993 its reverse (39910110002), we get a palindrome (59911211995).

The spelling of 20001101993 in words is "twenty billion, one million, one hundred one thousand, nine hundred ninety-three".