1818342837 has 20 divisors (see below), whose sum is σ = 2789707756. Its totient is φ = 1179463680.

The previous prime is 1818342811. The next prime is 1818342853. The reversal of 1818342837 is 7382438181.

1818342837 is a `hidden beast` number, since 18 + 183 + 428 + 37 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1402427601 + 415915236 = 37449^2 + 20394^2 .

It is not a de Polignac number, because 1818342837 - 2¹⁵ = 1818310069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1818342792 and 1818342801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818342037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 300364 + ... + 306357.

Almost surely, 2^1818342837 is an apocalyptic number.

It is an amenable number.

1818342837 is a deficient number, since it is larger than the sum of its proper divisors (971364919).

1818342837 is an equidigital number, since it uses as much as digits as its factorization.

1818342837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606770 (or 606761 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 1818342837 is about 42642.0313423270. The cubic root of 1818342837 is about 1220.5584733717.

It can be divided in two parts, 18183428 and 37, that added together give a triangular number (18183465 = T₆₀₃₀).

The spelling of 1818342837 in words is "one billion, eight hundred eighteen million, three hundred forty-two thousand, eight hundred thirty-seven".