11000020019985 has 24 divisors (see below), whose sum is σ = 19067578208640. Its totient is φ = 5866407546912.

The previous prime is 11000020019981. The next prime is 11000020020019. The reversal of 11000020019985 is 58991002000011.

It is not a de Polignac number, because 11000020019985 - 2² = 11000020019981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11000020019981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4629465 + ... + 6590294.

It is an arithmetic number, because the mean of its divisors is an integer number (794482425360).

Almost surely, 2^{11000020019985} is an apocalyptic number.

11000020019985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11000020019985 is a deficient number, since it is larger than the sum of its proper divisors (8067558188655).

11000020019985 is a wasteful number, since it uses less digits than its factorization.

11000020019985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11241557 (or 11241554 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 36.

Adding to 11000020019985 its reverse (58991002000011), we get a palindrome (69991022019996).

The spelling of 11000020019985 in words is "eleven trillion, twenty million, nineteen thousand, nine hundred eighty-five".