20003120000 has 160 divisors (see below), whose sum is σ = 50625201000. Its totient is φ = 7868160000.

The previous prime is 20003119967. The next prime is 20003120017. The reversal of 20003120000 is 2130002.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 20003120000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4877951 + ... + 4882049.

Almost surely, 2^20003120000 is an apocalyptic number.

20003120000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20003120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25312600500).

20003120000 is an abundant number, since it is smaller than the sum of its proper divisors (30622081000).

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

20003120000 is an frugal number, since it uses more digits than its factorization.

20003120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4194 (or 4167 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

Adding to 20003120000 its reverse (2130002), we get a palindrome (20005250002).

The spelling of 20003120000 in words is "twenty billion, three million, one hundred twenty thousand".