20001011011 has 8 divisors (see below), whose sum is σ = 20186369280. Its totient is φ = 19816433928.

The previous prime is 20001010999. The next prime is 20001011021. The reversal of 20001011011 is 11011010002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20001011011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001010985 and 20001011003.

It is not an unprimeable number, because it can be changed into a prime (20001011021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143791 + ... + 246328.

It is an arithmetic number, because the mean of its divisors is an integer number (2523296160).

Almost surely, 2^20001011011 is an apocalyptic number.

20001011011 is a deficient number, since it is larger than the sum of its proper divisors (185358269).

20001011011 is a wasteful number, since it uses less digits than its factorization.

20001011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390593.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 20001011011 its reverse (11011010002), we get a palindrome (31012021013).

The spelling of 20001011011 in words is "twenty billion, one million, eleven thousand, eleven".