20002111201993 has 2 divisors, whose sum is σ = 20002111201994. Its totient is φ = 20002111201992.

The previous prime is 20002111201967. The next prime is 20002111202023. The reversal of 20002111201993 is 39910211120002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19803683717689 + 198427484304 = 4450133^2 + 445452^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002111201993 - 2³⁷ = 19864672248521 is a prime.

It is not a weakly prime, because it can be changed into another prime (20002111211993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001055600996 + 10001055600997.

It is an arithmetic number, because the mean of its divisors is an integer number (10001055600997).

Almost surely, 2^{20002111201993} is an apocalyptic number.

It is an amenable number.

20002111201993 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002111201993 is an equidigital number, since it uses as much as digits as its factorization.

20002111201993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

Adding to 20002111201993 its reverse (39910211120002), we get a palindrome (59912322321995).

The spelling of 20002111201993 in words is "twenty trillion, two billion, one hundred eleven million, two hundred one thousand, nine hundred ninety-three".