1818918122 has 24 divisors (see below), whose sum is σ = 3175628004. Its totient is φ = 779093952.

The previous prime is 1818918119. The next prime is 1818918161. The reversal of 1818918122 is 2218198181.

It can be written as a sum of positive squares in 2 ways, for example, as 1390469521 + 428448601 = 37289^2 + 20699^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1818918122.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 215078 + ... + 223374.

Almost surely, 2^1818918122 is an apocalyptic number.

1818918122 is a deficient number, since it is larger than the sum of its proper divisors (1356709882).

1818918122 is a wasteful number, since it uses less digits than its factorization.

1818918122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10550 (or 10543 counting only the distinct ones).

The product of its digits is 18432, while the sum is 41.

The square root of 1818918122 is about 42648.7763247669. The cubic root of 1818918122 is about 1220.6871793798.

The spelling of 1818918122 in words is "one billion, eight hundred eighteen million, nine hundred eighteen thousand, one hundred twenty-two".