1819324668 has 96 divisors (see below), whose sum is σ = 5010987520. Its totient is φ = 502951680.

The previous prime is 1819324667. The next prime is 1819324681. The reversal of 1819324668 is 8664239181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1819324667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 391398 + ... + 396018.

Almost surely, 2^1819324668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1819324668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2505493760).

1819324668 is an abundant number, since it is smaller than the sum of its proper divisors (3191662852).

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

1819324668 is a wasteful number, since it uses less digits than its factorization.

1819324668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4787 (or 4785 counting only the distinct ones).

The product of its digits is 497664, while the sum is 48.

The square root of 1819324668 is about 42653.5422679055. The cubic root of 1819324668 is about 1220.7781177816.

The spelling of 1819324668 in words is "one billion, eight hundred nineteen million, three hundred twenty-four thousand, six hundred sixty-eight".