1813718120 has 16 divisors (see below), whose sum is σ = 4080865860. Its totient is φ = 725487232.

The previous prime is 1813718077. The next prime is 1813718149. The reversal of 1813718120 is 218173181.

It can be written as a sum of positive squares in 2 ways, for example, as 1625863684 + 187854436 = 40322^2 + 13706^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22671437 + ... + 22671516.

Almost surely, 2^1813718120 is an apocalyptic number.

1813718120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1813718120 is an abundant number, since it is smaller than the sum of its proper divisors (2267147740).

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

1813718120 is a wasteful number, since it uses less digits than its factorization.

1813718120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45342964 (or 45342960 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 32.

The square root of 1813718120 is about 42587.7696058387. The cubic root of 1813718120 is about 1219.5228179514.

The spelling of 1813718120 in words is "one billion, eight hundred thirteen million, seven hundred eighteen thousand, one hundred twenty".