20020011011 has 64 divisors (see below), whose sum is σ = 27220838400. Its totient is φ = 14218813440.

The previous prime is 20020010963. The next prime is 20020011043. The reversal of 20020011011 is 11011002002.

It is not a de Polignac number, because 20020011011 - 2⁶ = 20020010947 is a prime.

It is a super-2 number, since 2×20020011011² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20020011011.

It is not an unprimeable number, because it can be changed into a prime (20020011211) 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 63 ways as a sum of consecutive naturals, for example, 33422090 + ... + 33422688.

It is an arithmetic number, because the mean of its divisors is an integer number (425325600).

Almost surely, 2^20020011011 is an apocalyptic number.

20020011011 is a deficient number, since it is larger than the sum of its proper divisors (7200827389).

20020011011 is a wasteful number, since it uses less digits than its factorization.

20020011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20020011011 its reverse (11011002002), we get a palindrome (31031013013).

Subtracting from 20020011011 its reverse (11011002002), we obtain a palindrome (9009009009).

The spelling of 20020011011 in words is "twenty billion, twenty million, eleven thousand, eleven".