1818488213940 has 96 divisors (see below), whose sum is σ = 5218970714496. Its totient is φ = 472853606400.

The previous prime is 1818488213939. The next prime is 1818488214001. The reversal of 1818488213940 is 493128848181.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 935640 + ... + 2124240.

It is an arithmetic number, because the mean of its divisors is an integer number (54364278276).

Almost surely, 2^{1818488213940} is an apocalyptic number.

1818488213940 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 1818488213940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2609485357248).

1818488213940 is an abundant number, since it is smaller than the sum of its proper divisors (3400482500556).

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

1818488213940 is a wasteful number, since it uses less digits than its factorization.

1818488213940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189249 (or 1189247 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 57.

The spelling of 1818488213940 in words is "one trillion, eight hundred eighteen billion, four hundred eighty-eight million, two hundred thirteen thousand, nine hundred forty".