1812025118 has 4 divisors (see below), whose sum is σ = 2718037680. Its totient is φ = 906012558.

The previous prime is 1812025093. The next prime is 1812025129. The reversal of 1812025118 is 8115202181.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 453006278 + ... + 453006281.

It is an arithmetic number, because the mean of its divisors is an integer number (679509420).

Almost surely, 2^1812025118 is an apocalyptic number.

1812025118 is a deficient number, since it is larger than the sum of its proper divisors (906012562).

1812025118 is an equidigital number, since it uses as much as digits as its factorization.

1812025118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906012561.

The product of its (nonzero) digits is 1280, while the sum is 29.

The square root of 1812025118 is about 42567.8883432101. Note that the first 3 decimals coincide. The cubic root of 1812025118 is about 1219.1432482538.

Adding to 1812025118 its reverse (8115202181), we get a palindrome (9927227299).

The spelling of 1812025118 in words is "one billion, eight hundred twelve million, twenty-five thousand, one hundred eighteen".