20011011012 has 96 divisors (see below), whose sum is σ = 52344230400. Its totient is φ = 6610877856.

The previous prime is 20011011001. The next prime is 20011011073. The reversal of 20011011012 is 21011011002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20011010985 and 20011011003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16857883 + ... + 16859069.

It is an arithmetic number, because the mean of its divisors is an integer number (545252400).

Almost surely, 2^20011011012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20011011012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26172115200).

20011011012 is an abundant number, since it is smaller than the sum of its proper divisors (32333219388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20011011012 is a wasteful number, since it uses less digits than its factorization.

20011011012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2462 (or 2454 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20011011012 its reverse (21011011002), we get a palindrome (41022022014).

The spelling of 20011011012 in words is "twenty billion, eleven million, eleven thousand, twelve".