2018388490000 has 75 divisors (see below), whose sum is σ = 4887064363027. Its totient is φ = 807298568000.

The previous prime is 2018388489989. The next prime is 2018388490007. The reversal of 2018388490000 is 948838102.

The square root of 2018388490000 is 1420700.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 158241657616 + 1860146832384 = 397796^2 + 1363872^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2018388490007) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 142062897 + ... + 142077103.

Almost surely, 2^{2018388490000} is an apocalyptic number.

2018388490000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

2018388490000 is the 1420700-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2018388490000

2018388490000 is an abundant number, since it is smaller than the sum of its proper divisors (2868675873027).

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

2018388490000 is an frugal number, since it uses more digits than its factorization.

2018388490000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28442 (or 14214 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The spelling of 2018388490000 in words is "two trillion, eighteen billion, three hundred eighty-eight million, four hundred ninety thousand".