1818484668 has 504 divisors, whose sum is σ = 6593937840. Its totient is φ = 431101440.

The previous prime is 1818484667. The next prime is 1818484669. The reversal of 1818484668 is 8664848181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1818484667) and next prime (1818484669).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818484667) by changing a digit.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 20432368 + ... + 20432456.

It is an arithmetic number, because the mean of its divisors is an integer number (13083210).

Almost surely, 2^1818484668 is an apocalyptic number.

1818484668 is a gapful number since it is divisible by the number (18) 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 1818484668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3296968920).

1818484668 is an abundant number, since it is smaller than the sum of its proper divisors (4775453172).

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

1818484668 is a wasteful number, since it uses less digits than its factorization.

1818484668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 125 counting only the distinct ones).

The product of its digits is 2359296, while the sum is 54.

The square root of 1818484668 is about 42643.6943521548. The cubic root of 1818484668 is about 1220.5902071248.

The spelling of 1818484668 in words is "one billion, eight hundred eighteen million, four hundred eighty-four thousand, six hundred sixty-eight".