20011112010 has 96 divisors (see below), whose sum is σ = 52972133760. Its totient is φ = 5239766400.

The previous prime is 20011111987. The next prime is 20011112041. The reversal of 20011112010 is 1021111002.

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 = 20011111983 and 20011112001.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6269515 + ... + 6272705.

It is an arithmetic number, because the mean of its divisors is an integer number (551793060).

Almost surely, 2^20011112010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20011112010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26486066880).

20011112010 is an abundant number, since it is smaller than the sum of its proper divisors (32961021750).

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

20011112010 is a wasteful number, since it uses less digits than its factorization.

20011112010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4444 (or 4441 counting only the distinct ones).

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

Adding to 20011112010 its reverse (1021111002), we get a palindrome (21032223012).

The spelling of 20011112010 in words is "twenty billion, eleven million, one hundred twelve thousand, ten".