20011099999993 has 2 divisors, whose sum is σ = 20011099999994. Its totient is φ = 20011099999992.

The previous prime is 20011099999927. The next prime is 20011100000117. The reversal of 20011099999993 is 39999999011002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17746908693264 + 2264191306729 = 4212708^2 + 1504723^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011099999993 - 2⁹ = 20011099999481 is a prime.

It is not a weakly prime, because it can be changed into another prime (20011099699993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005549999996 + 10005549999997.

It is an arithmetic number, because the mean of its divisors is an integer number (10005549999997).

Almost surely, 2^{20011099999993} is an apocalyptic number.

It is an amenable number.

20011099999993 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011099999993 is an equidigital number, since it uses as much as digits as its factorization.

20011099999993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28697814, while the sum is 70.

The spelling of 20011099999993 in words is "twenty trillion, eleven billion, ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-three".