1809108018 has 12 divisors (see below), whose sum is σ = 3919734078. Its totient is φ = 603036000.

The previous prime is 1809108011. The next prime is 1809108043. The reversal of 1809108018 is 8108019081.

It can be written as a sum of positive squares in only one way, i.e., 1163287449 + 645820569 = 34107^2 + 25413^2 .

It is not an unprimeable number, because it can be changed into a prime (1809108011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50252983 + ... + 50253018.

Almost surely, 2^1809108018 is an apocalyptic number.

1809108018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1809108018 is an abundant number, since it is smaller than the sum of its proper divisors (2110626060).

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

1809108018 is a wasteful number, since it uses less digits than its factorization.

1809108018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100506009 (or 100506006 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The square root of 1809108018 is about 42533.6104510304. The cubic root of 1809108018 is about 1218.4886817407.

The spelling of 1809108018 in words is "one billion, eight hundred nine million, one hundred eight thousand, eighteen".