1998250306920 has 384 divisors, whose sum is σ = 7769424199680. Its totient is φ = 435782592000.

The previous prime is 1998250306901. The next prime is 1998250306939. The reversal of 1998250306920 is 296030528991.

It is a happy number.

1998250306920 is a `hidden beast` number, since 199 + 82 + 50 + 306 + 9 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (1998250306901) and next prime (1998250306939).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5366385 + ... + 5726655.

It is an arithmetic number, because the mean of its divisors is an integer number (20232875520).

Almost surely, 2^{1998250306920} is an apocalyptic number.

1998250306920 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 1998250306920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3884712099840).

1998250306920 is an abundant number, since it is smaller than the sum of its proper divisors (5771173892760).

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

1998250306920 is a wasteful number, since it uses less digits than its factorization.

1998250306920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360397 (or 360390 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The spelling of 1998250306920 in words is "one trillion, nine hundred ninety-eight billion, two hundred fifty million, three hundred six thousand, nine hundred twenty".