1818996860 has 48 divisors (see below), whose sum is σ = 3992369472. Its totient is φ = 694848000.

The previous prime is 1818996853. The next prime is 1818996871. The reversal of 1818996860 is 686998181.

It is a junction number, because it is equal to n+sod(n) for n = 1818996796 and 1818996805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319640 + ... + 325280.

It is an arithmetic number, because the mean of its divisors is an integer number (83174364).

Almost surely, 2^1818996860 is an apocalyptic number.

1818996860 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 1818996860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1996184736).

1818996860 is an abundant number, since it is smaller than the sum of its proper divisors (2173372612).

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

1818996860 is a wasteful number, since it uses less digits than its factorization.

1818996860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6374 (or 6372 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 56.

The square root of 1818996860 is about 42649.6994127743. The cubic root of 1818996860 is about 1220.7047929783.

The spelling of 1818996860 in words is "one billion, eight hundred eighteen million, nine hundred ninety-six thousand, eight hundred sixty".