1818266026 has 4 divisors (see below), whose sum is σ = 2727399042. Its totient is φ = 909133012.

The previous prime is 1818265997. The next prime is 1818266027. The reversal of 1818266026 is 6206628181.

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., 1573312225 + 244953801 = 39665^2 + 15651^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1818266026.

It is not an unprimeable number, because it can be changed into a prime (1818266027) 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, 454566505 + ... + 454566508.

Almost surely, 2^1818266026 is an apocalyptic number.

1818266026 is a deficient number, since it is larger than the sum of its proper divisors (909133016).

1818266026 is an equidigital number, since it uses as much as digits as its factorization.

1818266026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909133015.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 1818266026 is about 42641.1306838831. The cubic root of 1818266026 is about 1220.5412867269.

The spelling of 1818266026 in words is "one billion, eight hundred eighteen million, two hundred sixty-six thousand, twenty-six".