1998503220000 has 1440 divisors, whose sum is σ = 8098420176000. Its totient is φ = 431149824000.

The previous prime is 1998503219989. The next prime is 1998503220011. The reversal of 1998503220000 is 223058991.

It is an interprime number because it is at equal distance from previous prime (1998503219989) and next prime (1998503220011).

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 7429379866 + ... + 7429380134.

It is an arithmetic number, because the mean of its divisors is an integer number (5623902900).

Almost surely, 2^{1998503220000} is an apocalyptic number.

1998503220000 is a gapful number since it is divisible by the number (10) 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 1998503220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4049210088000).

1998503220000 is an abundant number, since it is smaller than the sum of its proper divisors (6099916956000).

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

1998503220000 is an equidigital number, since it uses as much as digits as its factorization.

1998503220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

Adding to 1998503220000 its reverse (223058991), we get a palindrome (1998726278991).

The spelling of 1998503220000 in words is "one trillion, nine hundred ninety-eight billion, five hundred three million, two hundred twenty thousand".