20001000011 has 4 divisors (see below), whose sum is σ = 20013447792. Its totient is φ = 19988552232.

The previous prime is 20001000001. The next prime is 20001000013. The reversal of 20001000011 is 11000010002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20001000011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20000999959 and 20001000004.

It is not an unprimeable number, because it can be changed into a prime (20001000013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6221480 + ... + 6224693.

It is an arithmetic number, because the mean of its divisors is an integer number (5003361948).

Almost surely, 2^20001000011 is an apocalyptic number.

20001000011 is a deficient number, since it is larger than the sum of its proper divisors (12447781).

20001000011 is a wasteful number, since it uses less digits than its factorization.

20001000011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12447780.

The product of its (nonzero) digits is 2, while the sum is 5.

Adding to 20001000011 its reverse (11000010002), we get a palindrome (31001010013).

Subtracting from 20001000011 its reverse (11000010002), we obtain a palindrome (9000990009).

The spelling of 20001000011 in words is "twenty billion, one million, eleven", and thus it is an aban number and an uban number.