20012012010 has 128 divisors (see below), whose sum is σ = 56501280000. Its totient is φ = 5026219776.

The previous prime is 20012011997. The next prime is 20012012011. The reversal of 20012012010 is 1021021002.

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 = 20012011983 and 20012012001.

It is not an unprimeable number, because it can be changed into a prime (20012012011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 876216 + ... + 898764.

It is an arithmetic number, because the mean of its divisors is an integer number (441416250).

Almost surely, 2^20012012010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20012012010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28250640000).

20012012010 is an abundant number, since it is smaller than the sum of its proper divisors (36489267990).

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

20012012010 is a wasteful number, since it uses less digits than its factorization.

20012012010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22757 (or 22751 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20012012010 its reverse (1021021002), we get a palindrome (21033033012).

The spelling of 20012012010 in words is "twenty billion, twelve million, twelve thousand, ten".