1818260242 has 4 divisors (see below), whose sum is σ = 2727390366. Its totient is φ = 909130120.

The previous prime is 1818260207. The next prime is 1818260263. The reversal of 1818260242 is 2420628181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2420628181 = 17 ⋅142389893.

It can be written as a sum of positive squares in only one way, i.e., 1272991041 + 545269201 = 35679^2 + 23351^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1818260198 and 1818260207.

It is an unprimeable number.

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, 454565059 + ... + 454565062.

Almost surely, 2^1818260242 is an apocalyptic number.

1818260242 is a deficient number, since it is larger than the sum of its proper divisors (909130124).

1818260242 is an equidigital number, since it uses as much as digits as its factorization.

1818260242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909130123.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 1818260242 is about 42641.0628619879. The cubic root of 1818260242 is about 1220.5399925235.

The spelling of 1818260242 in words is "one billion, eight hundred eighteen million, two hundred sixty thousand, two hundred forty-two".