20003120312 has 64 divisors (see below), whose sum is σ = 45491466240. Its totient is φ = 8049600000.

The previous prime is 20003120299. The next prime is 20003120317. The reversal of 20003120312 is 21302130002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003120317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 385937 + ... + 434687.

It is an arithmetic number, because the mean of its divisors is an integer number (710804160).

Almost surely, 2^20003120312 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 20003120312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22745733120).

20003120312 is an abundant number, since it is smaller than the sum of its proper divisors (25488345928).

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

20003120312 is a wasteful number, since it uses less digits than its factorization.

20003120312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49212 (or 49208 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20003120312 its reverse (21302130002), we get a palindrome (41305250314).

The spelling of 20003120312 in words is "twenty billion, three million, one hundred twenty thousand, three hundred twelve".