20001000320000 has 330 divisors, whose sum is σ = 58119259986612. Its totient is φ = 6857475072000.

The previous prime is 20001000319981. The next prime is 20001000320017. The reversal of 20001000320000 is 2300010002.

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 20001000320000.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 31041107 + ... + 31678893.

Almost surely, 2^{20001000320000} is an apocalyptic number.

20001000320000 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 20001000320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29059629993306).

20001000320000 is an abundant number, since it is smaller than the sum of its proper divisors (38118259666612).

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

20001000320000 is an frugal number, since it uses more digits than its factorization.

20001000320000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637841 (or 637801 counting only the distinct ones).

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

Adding to 20001000320000 its reverse (2300010002), we get a palindrome (20003300330002).

The spelling of 20001000320000 in words is "twenty trillion, one billion, three hundred twenty thousand".