20001001011 has 16 divisors (see below), whose sum is σ = 28113973248. Its totient is φ = 12629318400.

The previous prime is 20001000977. The next prime is 20001001021. The reversal of 20001001011 is 11010010002.

It is not a de Polignac number, because 20001001011 - 2⁹ = 20001000499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20001001021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2283550 + ... + 2292291.

It is an arithmetic number, because the mean of its divisors is an integer number (1757123328).

Almost surely, 2^20001001011 is an apocalyptic number.

20001001011 is a deficient number, since it is larger than the sum of its proper divisors (8112972237).

20001001011 is a wasteful number, since it uses less digits than its factorization.

20001001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4575922.

The product of its (nonzero) digits is 2, while the sum is 6.

Adding to 20001001011 its reverse (11010010002), we get a palindrome (31011011013).

The spelling of 20001001011 in words is "twenty billion, one million, one thousand, eleven".