1818291212 has 6 divisors (see below), whose sum is σ = 3182009628. Its totient is φ = 909145604.

The previous prime is 1818291199. The next prime is 1818291217. The reversal of 1818291212 is 2121928181.

It is not an unprimeable number, because it can be changed into a prime (1818291217) by changing a digit.

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 as a sum of consecutive naturals, namely, 227286398 + ... + 227286405.

It is an arithmetic number, because the mean of its divisors is an integer number (530334938).

Almost surely, 2^1818291212 is an apocalyptic number.

It is an amenable number.

1818291212 is a deficient number, since it is larger than the sum of its proper divisors (1363718416).

1818291212 is a wasteful number, since it uses less digits than its factorization.

1818291212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454572807 (or 454572805 counting only the distinct ones).

The product of its digits is 4608, while the sum is 35.

The square root of 1818291212 is about 42641.4260080500. The cubic root of 1818291212 is about 1220.5469222079.

The spelling of 1818291212 in words is "one billion, eight hundred eighteen million, two hundred ninety-one thousand, two hundred twelve".