1818387430243 has 8 divisors (see below), whose sum is σ = 1853553812400. Its totient is φ = 1783557568800.

The previous prime is 1818387430217. The next prime is 1818387430247. The reversal of 1818387430243 is 3420347838181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1818387430243 - 2⁹ = 1818387429731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1818387430247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84119268 + ... + 84140881.

It is an arithmetic number, because the mean of its divisors is an integer number (231694226550).

Almost surely, 2^{1818387430243} is an apocalyptic number.

1818387430243 is a deficient number, since it is larger than the sum of its proper divisors (35166382157).

1818387430243 is a wasteful number, since it uses less digits than its factorization.

1818387430243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168260357.

The product of its (nonzero) digits is 3096576, while the sum is 52.

It can be divided in two parts, 181838 and 7430243, that added together give a square (7612081 = 2759²).

The spelling of 1818387430243 in words is "one trillion, eight hundred eighteen billion, three hundred eighty-seven million, four hundred thirty thousand, two hundred forty-three".