1818322474 has 4 divisors (see below), whose sum is σ = 2727483714. Its totient is φ = 909161236.

The previous prime is 1818322409. The next prime is 1818322507. The reversal of 1818322474 is 4742238181.

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

It can be written as a sum of positive squares in only one way, i.e., 1310946849 + 507375625 = 36207^2 + 22525^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 454580617 + ... + 454580620.

Almost surely, 2^1818322474 is an apocalyptic number.

1818322474 is a deficient number, since it is larger than the sum of its proper divisors (909161240).

1818322474 is an equidigital number, since it uses as much as digits as its factorization.

1818322474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909161239.

The product of its digits is 86016, while the sum is 40.

The square root of 1818322474 is about 42641.7925748907. The cubic root of 1818322474 is about 1220.5539171489.

The spelling of 1818322474 in words is "one billion, eight hundred eighteen million, three hundred twenty-two thousand, four hundred seventy-four".