20001131011 has 4 divisors (see below), whose sum is σ = 20009547832. Its totient is φ = 19992714192.

The previous prime is 20001130997. The next prime is 20001131021. The reversal of 20001131011 is 11013110002.

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

It is a cyclic number.

It is not a de Polignac number, because 20001131011 - 2⁷ = 20001130883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001131021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4204845 + ... + 4209598.

It is an arithmetic number, because the mean of its divisors is an integer number (5002386958).

Almost surely, 2^20001131011 is an apocalyptic number.

20001131011 is a deficient number, since it is larger than the sum of its proper divisors (8416821).

20001131011 is an equidigital number, since it uses as much as digits as its factorization.

20001131011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8416820.

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 20001131011 its reverse (11013110002), we get a palindrome (31014241013).

The spelling of 20001131011 in words is "twenty billion, one million, one hundred thirty-one thousand, eleven".