20001300012 has 72 divisors (see below), whose sum is σ = 52509038400. Its totient is φ = 6413983488.

The previous prime is 20001299999. The next prime is 20001300017. The reversal of 20001300012 is 21000310002.

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 = 20001299967 and 20001300003.

It is not an unprimeable number, because it can be changed into a prime (20001300017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34189 + ... + 202907.

It is an arithmetic number, because the mean of its divisors is an integer number (729292200).

Almost surely, 2^20001300012 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 20001300012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26254519200).

20001300012 is an abundant number, since it is smaller than the sum of its proper divisors (32507738388).

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

20001300012 is a wasteful number, since it uses less digits than its factorization.

20001300012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168855 (or 168850 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 20001300012 its reverse (21000310002), we get a palindrome (41001610014).

The spelling of 20001300012 in words is "twenty billion, one million, three hundred thousand, twelve".