20001020200000 has 672 divisors, whose sum is σ = 61969493698560. Its totient is φ = 6245683200000.

The previous prime is 20001020199943. The next prime is 20001020200027. The reversal of 20001020200000 is 202010002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 737786446 + ... + 737813554.

It is an arithmetic number, because the mean of its divisors is an integer number (92216508480).

Almost surely, 2^{20001020200000} is an apocalyptic number.

20001020200000 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 20001020200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30984746849280).

20001020200000 is an abundant number, since it is smaller than the sum of its proper divisors (41968473498560).

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

20001020200000 is an equidigital number, since it uses as much as digits as its factorization.

20001020200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27201 (or 27171 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

Adding to 20001020200000 its reverse (202010002), we get a palindrome (20001222210002).

The spelling of 20001020200000 in words is "twenty trillion, one billion, twenty million, two hundred thousand".